Which statement about exoplanets is true?(1 point)
Responses

They only appear once before they disappear in space.
They only appear once before they disappear in space.

They are discovered when they dim a star they pass by.
They are discovered when they dim a star they pass by.

They are objects that are no longer considered planets.
They are objects that are no longer considered planets.

They can be detected by ordinary telescop

Answers

Answer 1

They are discovered when they dim a star they pass by ' is true statement about exoplanets  among all .

So , B is correct option .

In our solar system, every planet revolves around the Sun. Exoplanets are planets that revolve around other stars . Exoplanets are extremely difficult to directly observe using telescopes. The intense light from the stars they orbit obscures them .

Therefore, astronomers employ various techniques to find and research these far-off planets. By observing the impacts that these planets have on the stars they circle, astronomers look for exoplanets.

to Learn more about exoplanets please click here ,

https://brainly.com/question/21880131

#SPJ1


Related Questions

What is the mass in grams of 0.05 moles of gold?

Answers

The mass of 0.05 mole of gold is 9.85 grams.

Equation :

The following equation relates the mass and molar mass of a substance to its mole:

Mole = mass /molar mass

We can determine the mass of gold using the formula above. This is attainable as follows:

0.05 mole = gold in one mole.

Molar mass of gold = 196.97 g/mol

Mole = mass / molar mass

0.05 = mass / 196.97

Mass = 0.05 × 196.97

Mass of gold = 9.85 g

Hence, the mass of the gold is 9.85 g.

Definition of mass :

A physical body's mass is its total amount of matter. Additionally, it is a gauge of the body's inertia, or resistance to acceleration in the face of a net force The gravitational pull an object has on other bodies is also influenced by its mass. The kilogram is the fundamental unit of mass in the SI.

To know more about gravitational pull :

https://brainly.com/question/13467280

#SPJ9

a.
Neutrons have a neutral charge, a mass of 1 amu, and are found in an atom's ______

b.
Protons are a little smaller than neutrons, they still have a mass of 1 amu though. They are found inside an atom's nucleus and carry a
_______ charge.

C.
Electrons almost have no mass, it's so small we say it is 0 amu. They sail around the nucleus in the _______ They have a ______
charge.

Answers

Neutrons have a neutral charge, a mass of 1 amu, and are found in an atom's Nucleus , Protons are a little smaller than neutrons, they still have a mass of 1 amu though. They are found inside an atom's nucleus and carry a positive charge, Electrons almost have no mass, it's so small we say it is 0 amu. They sail around the nucleus in the orbit, They have a negative charge

Atoms of all elements except for most atoms of hydrogen have neutrons in their nucleus unlike protons and electrons, which are electrically charged, neutrons have no charge they are electrically neutral. that's why the neutrons in the diagram above are labeled  n⁰ and the zero stand for zero charge neutron has a neutral charge

Protons are found in the nucleus of the atom and this is a tiny, dense region at the center of the atom protons have a positive electrical charge of one  (+1)  and a mass of 1 atomic mass unit proton carry positive charge in the nucleus of atom

Electrons are one of three main types of particles that make up atoms and protons and neutrons, which consist of smaller, simpler particles, electrons are fundamental particles that do not consist of smaller particles electron has 0 amu and they have negative charge around the nucleus in the in the orbit called electron

Know more about Neutrons, Protons, Electrons

https://brainly.com/question/28667559

#SPJ1

Hydrologists are closely monitoring the health of a reservoir to determine if it will remain a suitable habitat for a rare species of fish. Which species would make the BEST bioindicator?
Responses
A Species C, a microbacterium that records show has lived in the reservoir for at least 70 years and can tolerate only slight variations in pH and dissolved oxygen levels.Species C, a microbacterium that records show has lived in the reservoir for at least 70 years and can tolerate only slight variations in pH and dissolved oxygen levels.
B Species A, a migratory bird which stops in the reservoir zone twice a year in great numbers.Species A, a migratory bird which stops in the reservoir zone twice a year in great numbers.
C Species B, a hardy bacterium that lives in the reservoir and is able to tolerate a wide range of pH’s and water temperatures.Species B, a hardy bacterium that lives in the reservoir and is able to tolerate a wide range of pH’s and water temperatures.
D Species D, a local hawk that lives in the reservoir zone year-round and preys upon some aquatic wildlife from the reservoir as well as many species from areas outside the reservoir zone.

Answers

The species that would make the BEST bioindicator is option C: Species B, a hardy bacterium that lives in the reservoir and is able to tolerate a wide range of pH’s and water temperatures. Species B, a hardy bacterium that lives in the reservoir and is able to tolerate a wide range of pH’s and water temperatures.

What are reservoir?

Humans, animals, and the environment are known to be the constituent of reservoirs. The source from which an agent is moved to a host may or may not be is known to be the reservoir.

For instance, since the soil serves as the reservoir for Clostridium botulinum, such that canned food harboring C. botulinum spores is the main reason of botulism diseases.

Therefore, The species that would make the BEST bioindicator is option C: Species B, a hardy bacterium that lives in the reservoir and is able to tolerate a wide range of pH’s and water temperatures. Species B, a hardy bacterium that lives in the reservoir and is able to tolerate a wide range of pH’s and water temperatures.

Learn more about reservoir from

https://brainly.com/question/12725067
#SPJ1

The diagram below shows the different phase transitions that occur in matter.

Which arrow would most likely represent the phase change that involves the same amount of energy as arrow 1?

Answers

A material changes physically when its state changes. They don't involve any alterations to the matter's chemical composition and are reversible. State changes that occur frequently include melting, freezing, sublimation, deposition, condensation, and vaporization.

Which arrow would most likely represent the phase change that involves the same amount of energy as arrow 1?

"Arrow 4."

The energy required to go from a liquid to a gas is equivalent to that required to go from a gas to a liquid.

The process by which a substance transforms from the liquid phase to the gaseous state is known as boiling.

Diagram of water in phase:

Water changes from a liquid to a gas through the phase-shifting process of evaporation (water vapor).

Water changes its state from a gas to a liquid during the phase shift process known as condensation, and the resulting vapor turns into a cloud.

To know more about Matter, click on the link below:

https://brainly.com/question/17011982

#SPJ9

Answer: arrow 4

Explanation: just took the test ;-)

What type of reaction is shown below?
CaCO3(s)→ Cao(s) + CO₂(g)
O A. Decomposition
OB. Single-displacement
O C. Double-displacement
OD. Combustion

Answers

A Decomposition

This is because a compound is breaking down, this being CaCO3.


8. A 9.7 ounce milk shake costs $3.45. There are 16 ounces in a pound. Determine the cost of a 5.5kg milkshake.

(454g per pound)
(10^-3 kilo unit = 1 unit)

Answers

The cost of a 5.5kg milkshake if 9.7 ounce milk shake costs $3.45 is $68.915.

Cost of 9.7 ounce milk shake = $3.45

Conversion of ounces into pound

One pound is equal to 16 ounces.

1ounces contain 1/16 pound.

9.7 ounces contain (1/16) × 9.7 pound.

9.7 ounces contain 0.606 pounds.

Cost of 0.606 pounds milk shake = $3.45

Conversation of pound into Gram

1 pound = 454g.

0.606 pounds = 454 × 0.606g

0.606 pounds = 275.12g

Conversation of gram into kilogram

1gram = 10^-3 kilo gram

275.12 gram = 275.12 × 10^-3 kilo gram

So, cost of 0.27512 kg milk shake = $3.45

cost of 1 kg milk shake = $3.45/ 0.27512 = $12.53

cost of 5.5 kg milk shake = $12.53 × 5.5 = $68.915

Thus, we calculated that the cost of a 5.5kg milkshake if 9.7 ounce milk shake costs $3.45 is

$68.915.

learn more about Pound or Ounces:

https://brainly.com/question/2598224

#SPJ9

For a radioactive isotope with a half life of 2 seconds, how much of a 50 Ci sample of the isotope will
remain after 6 seconds?

Answers

0.125

a radioactive isotope with a half life of 2 seconds, how much of a 50 Ci sample of the isotope will remain after 6 seconds

as per the statement, we have got

The half life period is 2 second

6 second  =2 sec / 6 sec ​= 3 half life periods.

The fraction of the material would remain after 6 second is

[tex]\frac{1}{2^3}[/tex] ​ =   1 / 8 = 0.125

half-life is the amt of time it took for half of the atoms in a gien sample of radioactive substance to decay. radiocarbon dating or carbon-14 is a method for dating ancient materials that were once living.

To know more about  half life visit :

https://brainly.com/question/24710827

#SPJ9

Total # of molecules in 2ZnSO4?

Answers

12.044x10^23 molecules in 2ZnSO4

as it is seen there are 2 moles in zinc sulphate

To find no of molecules in 2 moles of zinc sulphate

=no of moles × no of avogadro number

= 2×6.02214x10^23

= 12.044x10^23 molecules

A "mole" is the quantity of a material that is precisely 6.02214076 X 1023 particles in the International System of Units. The particles might be molecules, ions, or atoms.The term "mole," which can alternatively be spelt "mol," refers to a typical scientific unit of measurement in chemistry used to calculate large quantities of extremely small things like electrons, molecules, or other specified items. The Avogadro's Number (6.02214076 X 1023), which is constant for any element or set of particles, defines the mole as an extraordinarily enormous number of units. The International System of Units chose this value as the mole definition (SI)

To know more about  mole

visit : https://brainly.com/question/26416088

#SPJ9

Which of the following is an example of how financial goals change due to a value shift?
O buying a new wallet due to wear and tear to your current wallet
O moving from the city to suburbs after having children
O replacing a new phone after losing your old phone
O selling your old computer online to have funds for a new computers

Answers

Buying a new wallet due to wear and tear to your current wallet is referred to an  example of how financial goals change due to a value shift and is denoted as option A.

What is Value shift?

This is defined as the movement between the positive and negative values along a global spectrum of value and is usually dependent on different types of factors.

In this scenario, a torn wallet as a result of wear and tear means it has a negative value and having financial goals to buy a new one is referred to as the most appropriate choice.

Read more about Financial goals here https://brainly.com/question/2801397

#SPJ1

Answer: Moving from the city to suburbs after having children.

Explanation:

1) Once you start saving money, what can be your next step toward financial stability?

Investing it in a wise manner

2) Why is it important to track your income and your expenses?

 Because knowing whether you can afford your lifestyle or not is the 1st goal of financial literacy

3) As you grow older, which of these might make you change your personal finance decisions more?

 Your family priorities

4) Which showed you finance 1st?

 Your needs

5) Which of the following is an example of how financial goals change due to value shift?

 Moving from the city to suburbs after having children

6) Which expense is a spending want?

 Movie tickets

7) Which options show a financial goal? Select the 2 correct answers

 Paying off a credit card & saving for college

8) Which is a common way to spend money from your bank to a bank in a different country?

 Wire transfer

9) How can you deposit a paper check?

A & C

10) What is typically included in COGS?

All of the answers are correct

11) What is typically considered part of SG&? Slect the 2 correct answers

Billing cost & commissions

12) What is another term for income statement?

profit and loss (P&L) statement

13) What is another name for an emergency fund?

A rainy day fund

14) What is defined as a budget surplus?

Take-home pay exceeds spending

15) Is using 401(K) money in an emergency the best idea?

 No, early withdrawal of 401(K) money will incur a penalty

just took the Earning and Spending Unit Test.

Which angle is complementary toE0D

Answers

Answer:

?

Explanation:

Is there supposed to be a picture or is that only 5he question?

A sample of metal has a mass of 20.27 g, and a volume of 4.89mL. What is the density of this metal​

Answers

4145.19 g/L is the density of this metal.

A ratio of an object's mass to volume can be used to determine its density. Mass per unit volume is the measurement unit as a result.

From a physicist's point of view, mass can be described as a measurement of the quantity that is inside a body, omitting elements like the object's volume and any forces that might be exerting pressure on it.

The volume of an object is a measure of how much space it takes up in three dimensions.

ρ = m ÷ V  (Density is Mass divided by Volume)

Learn more about density here:
https://brainly.com/question/15164682

#SPJ9

what is the mass of 3.2 mL of a liquid with specific gravity of 0.986?

Answers

The mass of 3.2 mL of a liquid with specific gravity of 0.986 is 3.155 g

What is density?

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the above formula, we can determine the mass of the liquid. Details below

How to determine the mass of the liquid

The following data were obtained from the question:

Volume of liquid = 3.2 mLDensity of liquid = 0.986 g/mLMass of liquid =?

Density = mass / volume

Cross multiply

Mass = Density × Volume

Mass of liquid = 0.986 × 3.2

Mass of liquid = 3.155 g

Thus, the mass of the liquid is 3.155 g

Learn more about density:

https://brainly.com/question/952755

#SPJ1

Gold has an atomic mass of 197.0 grams per mole. How many moles of gold is 10 grams? How many gold atoms are found in 10 grams of gold?

Answers

How many moles of gold is in 10 grams?

You first take 10g of Gold and divide it by 197.0 g of gold (it’s atomic mass)
this should give you about 0.051 moles of Gold

How many gold atoms are found in 10 grams of gold?

First you would take 10g of gold and divide it by 197.0g of gold then you would multiply that number (number of moles in 10g of gold) by Avogadro’s constant 6.022x10^23
You should get about 3.06x10^22 atoms of gold

ANSWER ASAP FORF BRAINLIEST!!!!!
For this and the following two questions, determine the density of a substance (in g/dL) of a sample with a mass of 8.3 x 10-1 dag and a volume of 4.10 mL. What is the right-most significant figure after performing the calculation in scientific notation?

Answers

The density of a substance (in g/dL) of a sample with a mass of 8.3 x 10-¹ dag and a volume of 4.10 mL is 202.44g/dL.

How to calculate density?

The density of a substance is the measure of the mass of matter contained by a unit volume.

The density of a substance can be calculated by dividing the mass of the substance by its volume.

According to this question, a substance with a mass of 8.3 x 10-¹ dag has a volume of 4.10 mL. The density can be calculated as follows:

1 dag = 10g0.83 dag = 8.3g

1 millilitre = 0.01 decilitre4.10millitre = 0.041 deciliter

Density = 8.3g ÷ 0.041dL

Density = 202.44g/dL

Therefore, the density of a substance (in g/dL) of a sample with a mass of 8.3 x 10-¹ dag and a volume of 4.10 mL is 202.44g/dL.

Learn more about density at: https://brainly.com/question/21461758

#SPJ1

A baseball is pitched to the batter,
What is the motion of the reference

Answers

The base ball moves in a variety of patterns as a result of rotation and the air-spinning motion of the gap.

A light green powder is
heated in a test tube. A gas is given off while
the solid becomes black. What type of change is
occurring? Explain your reasoning.

Answers

The sample is undergoing chemical change.

When one chemical material changes into one or more others, as when iron rusts, this is referred to as a chemical change.

There are five signs that shows us that the object is undergoing chemical change-

1. Change of colour

2. Change of temperature

3. Gas evolution

4. Precipitate formation

5. Production of smell

Therefore According to the given question the sample is giving off a solid precipitate of black colour. Also, there is evolution of gas so the given sample is undergoing a chemical change.

Additionally, this is a type of Decomposition reaction where in the gas evolved is a Carbon dioxide. Also the given sample is a Compound because two products are formed.

Hence, it is a chemical change.

To learn more about chemical change refer- https://brainly.com/question/1222323

#SPJ9

Choose the combination of factors that creates a thunderstorm

Relative Humidity
Low or high?

Air Temperature
Cold or warm?

Air Pressure
Low or high ?

Helpppp

Answers

Answer:

High humidity

Warm

High Pressure.

Answer:

Relative Humidity: high

Air Temperature: warm

Air Pressure: low

Indicate the type of observation that is best represented by the figures below.

Identifying Types of Observations

qualitative
quantitative

Identifying Types of Observations
qualitative

quantitative

Identifying Types of Observations
qualitative

quantitative

Answers

The observation shown in the image is qualitative.

Chemical analysis will be;   Qualitative

Quantitative :

In a qualitative chemical analysis, we can  determine the components of a substance. In a quantitative analysis, we want to determine the amount of every  of the components of a substance. Both sorts of analysis are of very much  important in chemistry.

From the image, we could  observe a change in color . Qualitative analysis might  be carried out by the  use of chemical reagents which could give positive tests like  as  change  in color to show the presence or absence of some  constituents of a  given substance.

Qualitative :

Qualitative analysis provides the  details of the presence or nonappearance of different chemical components in a unknown sample. Qualitative chemical analysis,  deals with the branch of chemistry identification of elements or grouping of elements provided in a sample. This  techniques employed in qualitative analysis vary in complexity, depending on the nature of the sample

Learn more about Quantitative chemical analysis :

brainly.com/question/14805124

#SPJ9

Which of the following statements is TRUE?

A sodium (Na) atom has a larger radius than a potassium (K) atom.
A neon (Ne) atom has a smaller radius than an oxygen (O) atom.
A fluorine (F) atom has a smaller first ionization energy than oxygen (O) atom.
None of the statements are true.

pls explain the correct answer. i have to explain why its correct

Answers

Explanation:

hi I am not sure if you have any questions or concerns please visit the plug-in settings to try and you have any questions or concerns please visit

Oxygen has six electrons in its outer shell. How many electrons do you predict sulfur, selenium, tellurium and polonium will have in their outer shell? Why?

Answers

The number of electrons for sulfur, selenium, tellurium, and polonium will have in their outer shell is 6,6,6,6 respectively.

The electronic configuration of an element depicts the number of electrons in the outermost shell.Oxygen has six electrons which are for the configuration 1s22s22p4Similarly sulfur has the electronic configuration as [Ne]3s23p4So the  number of outer shell electrons is 6Similarly, selenium has 34 atomic number, and electrons is 2,8,18,6 so the outer shell electrons is 6The number of valence electrons of tellurium is 6 as the electronic configuration is 2,8,18,18,6The number of valence electrons is 6The electronic configuration of polonium is 2,8,18,32,18,6So the outer shell electrons is 6

To learn more about the outermost shell visit:

https://brainly.com/question/5236337

#SPJ1

The mass unit associated with density is usually grams. If the volume (in mL or cm3 ) is multiplied by the density ( g/mL or g/cm3 ) the volume units will cancel out, leaving only the mass units. Keep in mind that the volume and density must use the same volume unit for the cancellation.

If a large marshmallow has a volume of 2.75 in3 and density of 0.242 g/cm3 , how much would it weigh in grams? 1 in3=16.39 cm3 .

Answers

The mass of the marshmallow is 10.9 g.

What is the relationship between mass, volume and density of a substance?

The mass of a substance is the quantity of matter present in that substance.

The volume of a substance is the amount of space a given mass of that substance occupies.

The density of a substance is the ratio of the mass and a given volume of that substance.

Therefore, the relationship between mass, volume and density is given below as:

Density = mass/ volume

From the data provided:

volume of the marshmallow = 2.75 in³

1 inch³ = 16.39 cm³

volume in cm³ = 16.39 * 2.75

volume of the marshmallow = 45.07 cm³

density of the marshmallow = 0.242 g/cm³

Mass of the marshmallow = volume × density

Mass of the marshmallow = 0.242 g/cm³ * 45.07 cm³

Mass of the marshmallow = 10.9 g

Learn more about mass, volume and density at: https://brainly.com/question/952755

#SPJ1

You have been given a sample of dirt on the a slide. Describe the process of how you are going to find an organisms in that dirt sample.


PLEASE HURRY TYSM

Answers

The micromorphology is a process  we are going to use to find an organisms in that dirt sample.

What is micromorphology?

Micromorphology is defined as the fine level structure or morphology of an organism, mineral, soil and dirt component visible through microscope.

It is the microscopic study of soil, dirt and sediments.

It is a branch of soil science that is concerned with the description, interpretation and to a increasing extant the measurement of components,  features and fabrics in soil or dirt at microscopic level.

Thus, the micromorphology  is a process  we are going to use to find an organisms in that dirt sample.

To learn more about morphology, refer to the link below:

https://brainly.com/question/23673404

#SPJ1

6. CCC Patterns Compare the ions of elements listed in the table with the atoms of
the element. Based on the patterns in their particle compositions and charges,
write a definition for "ion."

Answers

CCC Pattern compare the ions of elements listed in the table with the atoms of the element. Based on the patterns in their particle compositions and charges, the definition of ion would be that CCC pattern compare ions of elements.

An ion is a structure in crystal system having regular repeating arrangement, which can be called as an ionic lattice.

Lattice is formed because ions attract each other and form a regular pattern with oppositely charged ion next to each other.

An atom is the smallest unit of an element that retains the chemical properties of element. Every atom includes a nucleus, generally containing both positively charged particles called ions and uncharged particles called ion.

In the space surrounding, the nucleus are negatively charged particles called electron.

Therefore, ions are oppositely charged particles in lattice.

To learn more about CCC patterns,

brainly.com/question/24741756

#SPJ1

Water is homogeneous substance true or false

Answers

Answer: pure water is homogeneous and pure substance.

Explanation: However, when a homogeneous substance consists of two or more different types of molecules uniformly intermingled with one another, then it’s called a homogeneous mixture. A mixture’s composition can vary, but a pure substance does not.

Answer:

True

Explanation:

since the gases and minerals dissolved in water are in the same state as water and they do not form separate layers

pOH of a solution that contains 3.5 g of sulfuric acid dissolved in 1.75 liters of
solution.

Answers

The pOH of a solution that contains the given volume and mass is 1.690.

Equation :

To calculate pOH of sulfuric acid we must know the moles and concentration.

So, to calculate moles using formula,

moles = mass / molecular mass

Given,

mass = 3.5 g

volume = 1.75 lit

So,

moles of sulfuric acid = mass / molecular mass

Putting values,

moles of sulfuric acid = 3.5g / 98.079 g/mol

moles of sulfuric acid = 0.0357mol

Now to know the concentration we are using the formula,

Concentration of sulfuric acid = moles / volume

Putting values,

Concentration of sulfuric acid = 0.0357mol / 1.75l

Concentration of sulfuric acid = 0.0204 mol/l

pOH + pH = 14

pOH = -log(0.0204)

pOH = 1.690

To know more about moles :

https://brainly.com/question/20486415

#SPJ9

Iron, carbon, and phosphorus are elements found in the periodic table. Tests involving these three elements would show that at normal room temperature

Answers

Aluminum is malleable and conducts electricity

Mercury has a density of 13.6 g/mL. What is
the mass in pounds of 556 mL of mercury?

Answers

Answer: 16.7 pounds of mercury

Explanation:

556 mL * 13.6 g/mL=

556 mL * 13.6 g/1 mL=

556 * 13.6/1=

556*13.6=

7561.6 g=

7561.6 g * 1 pound/453.592 g=    ==> 1 pound=453.592 grams

7561.6 * 1/453.592=

7561.6/453.592=

16.67=16.7 pounds of mercury

The measure of how densely a material is packed together is called density. As the mass per unit volume, it has that definition. The mass in pounds of mercury is 16.635 pounds.

The term "density" refers to the ratio between the volume (the amount of space an object or substance occupies) and the mass (the quantity of material it contains). Density can also be defined as the quantity of mass per unit of volume. A dense object is one that is both hefty and small.

Density is the measure of an object's mass per unit volume. Kilograms per cubic meter (kg/m³) is the SI unit for density.

Density = Mass / Volume

13.6 g/mL = (m) / (556 mL)

m = 13.6 g/mL × 556 mL

m = 7561.6 g

1 g = 0.0022 pound

7561.6 g = 16.635 pounds

To know more about density, visit;

brainly.com/question/29775886

#SPJ7

Write orbital diagrams for each ion. Determine if the ion is diamagnetic or paramagnetic. Cd2+

Answers

The orbital diagram is shown below ,

The [tex]Cd^{+2}[/tex] ion is diamagnetic .

The Atomic number of Cd = 48

Electronic configuration of Cd is is [tex]1s^{2} 2s^{2}2p^{6} 3s^{2} 3p^{6} 3d^{10} 4p^{6} 4d^{10}5s^{2}[/tex] .

After the removing two electrons from Cd , Cd gets two positive charges and becomes   [tex]Cd^{+2}[/tex] .

The electronic configuration of  [tex]Cd^{+2}[/tex]  is  [tex]1s^{2} 2s^{2}2p^{6} 3s^{2} 3p^{6} 3d^{10} 4p^{6} 4d^{10}[/tex] .

The  [tex]Cd^{+2}[/tex] has no unpaired electron . Hence , it is diamagnetic in nature .

The orbital diagram of  is shown as follows,

The shell structure of a cadmium atom, which has 48 electrons, is 2.8. 18.18.2. Ground state gaseous neutral cadmium has the electron configuration [Kr] in its ground state.

To learn more about orbital diagram please click here ,

https://brainly.com/question/14487703

#SPJ1

MATCH THE ANSWER TO SOLVE THE PH

1.
The pH of a solution with a [H3O+] = 7.5 x 10-4 M.

:
The pH of a solution with a [H3O+] = 7.5 x 10-4 M.

2.
The pH of a solution with a [H3O+] = 9.4 x 10-7 M.

:
The pH of a solution with a [H3O+] = 9.4 x 10-7 M.

3.
The pH of a solution with a [H3O+] = 3.7 x 10-14 M.

:
The pH of a solution with a [H3O+] = 3.7 x 10-14 M.

4.
The pH of a solution with a [H3O+] = 4.2 x 10-2 M.

:
The pH of a solution with a [H3O+] = 4.2 x 10-2 M.

a.pH = 2.6
b.pH = 4.9
c.pH= 1.4
d.pH= 3.1
e.pH = 14.6
f.pH = 8.0
g.pH = 13.4
h.pH = 6.0

Answers

The pH of a solution with a [H3O+]  is 4.9 .Thus option (b) is true.

What is pH?

pH is defined as negative log of H3O+ ion construction.

The pH can be calculated using formula:

pH = - log [H3O+].

[H3O+] = 7.5 x 10-4 M

pH = - log[7.5 x 10-4M]

pH = 4.9

The pH of a solution with a [H3O+] = 9.4 x 10-7 M = 2.6 = (a)

The pH of a solution with a [H3O+] = 3.7 x 10-14 M = 4.9 = (b)

The pH of a solution with a [H3O+] = 4.2 x 10-2 M = 2.6 = (a)

Thus, the pH of a solution with a [H3O+]  is 4.9 .Thus option (b) is true.

To learn more about pH, refer to the link below:

https://brainly.com/question/491373

#SPJ1

Use
the periodic table to choose the element that matches each description.
halogen
group IIA:
A
nonreactive:
alkali metal:
DONE

Answers

Halogens are p-block elements, group IIA & alkali metal belongs to s-block and nonreactive elements are known as noble gases.

What is the periodic table?

Chemical elements are listed on a periodic table according to their atomic number. Carbon and oxygen are two of the chemical elements listed in the periodic table.

What are the main features of the periodic table?

The Periodic Table groups the elements according to their linked chemical and physical properties. The table consists of rows and columns. Vertical columns of the periodic chart represent groups. The table displays periods as horizontal rows.

To know more about Periodic table visit:

https://brainly.com/question/11155928

#SPJ9

Other Questions
a positive five-digit integer is in the form $ab,cba$; where $a$, $b$ and $c$ are each distinct digits. what is the greatest possible value of $ab,cba$ that is divisible by eleven? A drop in blood pH causes an increase in heart rate. What is the function of this control mechanism? if a book has 15 authors, include only the first three authors Juan and sergei are making a display about water conservation. To make a greater visual impact, they decide to add blue food coloring to the water, but just enough that it is noticeable. Juan adds 2 drops of food coloring to the water, and stops because he can see the blue color. Sergei tells him to put another drop in because he doesnt see any blue yet. Juans _______________ is probably lower than sergeis. Entrepreneurs are investors, but not all investors are entrepreneurs. the distinguishing characteristic is? characteristics of successful budgets include being: a. realistic. b. well planned. c. clearly communicated. d. flexible. e. all of these Which cranial nerves are associated with the parasympathetic division of the autonomic nervous system?. the combination of high job involvement and organizational commitment creates, what the gallup organization has called A person following safe weekly weight loss guidelines who lost ______ has achieved a weekly loss of 1 pound.16 pounds in 16 weeks32 pounds in 16 weeks1 pound in 2 weeks 100 why are only a fraction of people who apply for permanent residency actually approved? 27. In a study researchers looked at the effects of nutrition on reading ability. In Group A, childrenate at least three ounces of dark green vegetables every day for one month. In Group B, childrenwere fed their regular diet. At the end of the month, the children took a reading comprehensiontest. Those who ate the green vegetables every day for one month (Group A) did not vary in theirtest scores when compared to Group B.What is the Experimental Group:What is the Control Group:What is the Dependent variable?What is the Independent variable? A prize at an arcade costs 545 tickets. You have 435 tickets, and your friend has690 tickets. Can you buy the prize when your friend gives you 1/6 of their tickets?Explain. 3. During a school trip, Class 6 students of a school saw the sign shown below at the entrance of an amusement park ride. Which of the following can be the MAXIMUM number of these students who can take the ride at the same time? Sign The Lazy Poseidon Maximum Capacity 1000 kgs Have Fun!a. 5b. 20 c. 50 d. 100 so the helming woman went on her rounds,queenly and dignified, decked out in rings,offering the goblet to all ranks,treating the household and the assembled troopuntil it was beowulfs turn to take it from her hand.which feature of anglo-saxon culture is described in the excerpt?a christian traditiona cup-bearera gift-givinga pagan tradition Who got the right to vote first? Black Men or White Women?In YOUR opinion what grade (A+, A, A, B+, B, B, C+, C, C, D+, D, D and F) would you give men towards their treatment towards women during 1700-1800s? If the points A, B, and C are clinear with B between A and C, and if AC = 21 and AB = 7, what is thelength of line segment BC?BC= The total amount of air a person can exhale after filling the lungs completely is called:________ Light-rail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant (and quite modest) acceleration. A train travels through a congested part of town at 7.0 m/s . Once free of this area, it speeds up to 13 m/s in 8.0 s. At the edge of town, the driver again accelerates, with the same acceleration, for another 16 s to reach a higher cruising speed. A basketball player whose game-to-game points were consistent, will have a more reliable average because? Which of the following is a type of magnetic material found in scissors?