i need the answers pleaseee! this is acids and bases for chemistry

The container contains 8.96 × 10⁶ C negative electric charges in the electrons of all the lithium atoms.

We have 3 moles of electrons (e⁻) in 1 mol of Li, so the quantity of negative electric charge is:

hence

negative electric charges =  3 × 31 × 6.022 × 10²³ × 1.60 × 10⁻¹⁹

negative electric charges = 8.96 × 10⁶ C

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The w/w % of an aqueous solution of ammonia is 27.01%.

w/w % or "weight by weight" is the proportion of a particular substance within a mixture, measured by weight or mass.

c(NH₃) = 14.3 M; concentration of ammonia solution

d(NH₃) = 0.900 g/mL; density of ammonia solution

V(NH₃) = 100 mL = 0.1 L; chosen volume of ammonia solution

M(NH₃) = 17 g/mol; molar mass of ammonia

ms(NH₃) = d(NH₃) × V(NH₃)

ms(NH₃) = 0.900 g/mL × 100 mL

ms(NH₃) = 90 g; mass of ammonia solution

m(NH₃) = c(NH₃) × V(NH₃) × M(NH₃)

m(NH₃) = 14.3 M × 0.1 L × 17 g/mol

m(NH₃) = 23.31 g; mass of pure ammonia (solute)

w/w % = m(solute) / m(solution) × 100%; formula to calculate w/w %

w/w % = 23.31 g / 90 g × 100%

w/w % = 27.01%

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For a particular redox reaction ClO2– is oxidized to ClO4– and Fe3 is reduced to Fe2 .

Redox is a sort of chemical reaction where the substrate's oxidation states change.

An rise in an object's oxidation state or the loss of electrons is referred to as oxidation.

Gaining electrons or lowering an atom's oxidation state are both considered to be reductions in the context of chemical reactions.

Redox reactions can be divided into two categories:

only one electron (typically) moves from the reducing agent to the oxidant during an electron transfer. Redox couples and electrode potentials are frequently used to describe this type of redox reaction.

Atomic transfer refers to the movement of an atom from one substrate to another. For instance, when iron rusts, iron atoms get more oxidized as they change into an oxide at the same time.

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An example of a physical change is the Making of icecream .

What is a physical change?

A  physical change is a type of change in which the form of matter is altered but one substance is not transformed into another.  the dimensions or shape of matter may be changed, but no reaction occurs.

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Cooking rice by burning wood in the stove are the thermal and heat absorbing chemical reaction.

Any chemical reaction that absorbs heat from its surroundings is an endothermic reaction. The absorbed energy needs to serve as the activation energy for the reaction to take place. This type of reaction is distinguished by its cold sensation.

Endothermic is a chemical reaction or physical change that absorbs heat from its surroundings. During an endothermic process, the system absorbs heat from its surroundings, causing the temperature of the environment to fall.

Thermal energy sources include natural gas, coal, and oil, as well as solar, heat pump electric, and geothermal heat. Though thermal energy has few negative environmental effects, a few issues must be addressed before it can be considered a truly green source of power.

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Explanation:

An exothermic reaction occurs when the temperature of the system increases due to the evolution of heat as well as carbon dioxide , water vapour and as produced.

A plot of 1/[a] versus time produces a line with a positive slope for the reaction a → b+ c. The reaction may be a second order reaction.

The strength of the rate's dependency on the reactant concentration determines the reaction's order. As a result, the speed of a first-order reaction will undoubtedly depend on the concentration of a single species, a second-order reaction will undoubtedly depend upon the concentration of two species, and so on.

rate = k{[A]^x + [B]^y}

Thus, for the given reaction, order is 2, that's a plot of 1/[a] vs time producing a straight line with positive slope shows second order kinetics.

Determine the reaction order and therefore the rate constant. If a plot of reactant concentration versus time isn't linear, but a plot of 1/reaction concentration versus time is linear, then the reaction is second order

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Answer:

-evidence that some kinds of matter are made up of waves instead of particles

-observations that cannot be explained by the theory

Explanation:

Both of these are right.

1.811 g of NaCl we need to use to make the solution.To make the solution we need to calculate the amount of NaCl to dissolve to make solution.

The analysis of the mass need to use to make the solution is shown below:

We understand that molarity is

Molarity = no. of moles/ Volume

So,

No. of moles = Molarity x Volume

= 0.031 moles

Now

mass = Moles x Molecular weight

where,

The Molecular weight of NaCl is 58.44 g per mole

And, the moles are 0.031 moles

So, the mass of NaCl is

= 1.811 g

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Through an unprecedented coupling of aryl iodides and methyl ketones in the presence of silver triflate, these complexes with distinctive catalytic activity enable the quick synthesis of 1,3-disubstituted naphthalenes.

What is the process of naphthalene synthesis?

A methyl ketone is first arylated on a Pd catalyst, and then it is cyclized with a second equivalent of a ketone to complete the transition. This ketone arylation process is significant since it takes place in oxidizing circumstances, which points to the use of dimeric Pd catalysts with greater oxidation states.

The mechanism involving Pd(III) bimetallic catalysis at a high oxidation state on the basis of measurements and DFT calculations. We confirm the significance of the palladium catalyst for both arylation and cyclization for naphthalene production because these new bimetallic complexes exhibit reactivity that is not seen with monometallic Pd catalysts.

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Answer:

45 = 82

Explanation:

58

The functional groups in daumone;

- alcohol

- ether

- carboxylic acid

A functional group is an atom, group of atoms or bond that is responsible for the chemical reactivity of the members of a homologous series. The homologous series refers to a family of compounds that have similar reactivity.

We know that organic molecule are almost always known to contain carbon. The functional groups in the molecule could help us to know the kind of reactions that could occur in the molecule since the reactions could only occur at the functional groups in the molecule as shown.

Let us now consider the compound daumone which has been found to be responsible for the hibernation of worms. The functional groups in the molecule are;

- alcohol

- ether

- carboxylic acid

These are the known functional groups that we can see in the molecule as shown above in the question.

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Find hydrogen ion concentration of the original solution using the law of mass conservation after some further algebraic manipulation:

[H+]2+Ka[H+]-KaCa=0 (Ka - weak acid dissociation constant, Ca – weak acid concentration)

Ka=10-6.3=5.01*10-7

Set up the quadratic equation: [H+]2+5.01*10-7*[H+]-5.01*10-7 *0,10=0

Solve the quadratic equation: [H+]=2*10-4

pH=3.7

What is law of mass conservation?

The law of conservation of mass, also known as the principle of mass conservation, in physics and chemistry states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time because the mass of the system cannot change and therefore quantity cannot be added to or subtracted.

Therefore,

Find hydrogen ion concentration of the original solution using the law of mass conservation after some further algebraic manipulation:

[H+]2+Ka[H+]-KaCa=0 (Ka - weak acid dissociation constant, Ca – weak acid concentration)

Ka=10-6.3=5.01*10-7

Set up the quadratic equation: [H+]2+5.01*10-7*[H+]-5.01*10-7 *0,10=0

Solve the quadratic equation: [H+]=2*10-4

pH=3.7

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An important, common measure of how easily of chemical can evaporate and enter the atmosphere is vapor pressure.

What is vapor pressure?

The transition of the molecule from its solid form to its gaseous state has been called evaporation. The intermolecular forces for state transmission have been broken as a result of an energy input.

The pressure that the air molecules have been applying is known as the vapour pressure. The kinetic energy has a direct relationship with the vapour pressure. The conversion to the vapour state has been mediated, and there has been more kinetic energy the higher the vapour pressure.

Thus, in terms of vapour pressure, the chemical can easily evaporate.

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The state of the substance is likely a gas.

Matter, which refers to any substance that has mass and occupies space, is made up of three states as follows:

A gas is a state of matter intermediate between liquid and plasma that can be contained only if it is fully surrounded by a solid. It has no definite shape and only conforms to the volume of its container.

According to this question, a substance fills the cube and has a volume of 50-mL and 10-mL respectively when placed in containers of such volumes.

This suggests that the substance being referred to is a gas.

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24J is the energy of the baby and its car seat.

We know that, height=  h= 2 m

Weight of baby and the car= m= 12 N

The energy that the baby and the car seat contain is in the form of potential energy because they are both motionless, or at rest.

Potential energy is given by,

P.E= m*g*h

where.

m= mass of the body

g= acceleration due to gravity

h= height

W = m*g

Expressing the energy equation as and replacing the result with:

P.E = W*h

On substituting the given values we get:

P.E= 12*2

P.E= 24 J

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The process which does not saturate air with water vapor is increasing the carbon dioxide content of air.

What is saturation of air?

The term "saturated air" refers to an air volume that can store the most water vapor at a particular temperature. The air's water-vapor content as compared to its saturation level is known as relative humidity.

It is said that air is saturated when it has a 100% relative humidity, or when it can store as much water vapor as it can for a given temperature. Warm air is used to dry goods because it absorbs moisture and increases the amount of water it can store when saturated air is heated (relative humidity decreases).

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Answer:

Answer: What two variables affect the kinetic energy of an object? Speed and Mass. ... The kinetic energy will do nothing but keep the same

Explanation:

The polycyclic aromatic hydrocarbon (pah), anthracene, has a molar concentration of 2.643 x 10-8.

What is molar concentration?

The phrase "molar concentration" (also known as "molarity," "amount concentration," or "substance concentration") refers to the amount of a substance per unit volume of solution and is used to describe a chemical species' (more particularly, a solute's) concentration in a solution.

The number of moles per liter, represented by the unit sign mol/L or mol/dm3 in SI units, is the most common way to measure molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or one M.

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Answer:

The highest energy level number (1 through 7) for the electrons in an atom corresponds to the period (or row) in the periodic table to which that atom belongs. Because there are 7 periods in the table, there are 7 energy levels. For example, hydrogen (H) is in the first period, so it has only one energy level.

Answer:

The number of valence electrons in an atom is reflected by its position in the periodic table of the elements.

Explanation:

Across each row, or period, of the periodic table, the number of valence electrons in groups 1  2 and 13  18 increases by one from one element to the next.

Option A) The arrow is pointing towards the Hydrogen ion in the solution of the different molecules.

When a hydrogen atom acquires or loses an electron, a hydrogen ion is produced.

The only time a positively charged hydrogen ion (or proton) is observed alone is when it is in a gaseous condition in a place that is almost particle-free.

One water molecule has two sides, one of which is partially negative and the other partially positive.

Because the oxygen atom is more electronegative than the hydrogen atoms, one side of a water molecule is partially negative (the oxygen side), and the other side is partially positive (the hydrogen side).

An atom’s attraction to shared electrons in bonds is referred to as electronegativity.

Cohesion, the water Becomes Sticky Due to Hydrogen Bonds. Hydrogen bonds form between nearby hydrogen and oxygen atoms of adjacent water molecules in the case of water.

A bond called a hydrogen bond is produced by the attraction between individual water molecules.

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Correct question

What is the arrow pointing to?

The figure shows a solution of different molecules. Some of them consist of two small atoms attached to a bigger one. Some are negatively charged, and consist of one big atom attached to the small one. There are also small positively charged atoms, which are pointed by an arrow.

A) Hydrogen ion

B) Hydronium ion

C) Electron

D) Hydroxide ion

E) Water molecule

Answer: Lithium has the least mass.

Explanation: Period 2 of the Periodic Table includes the following elements:

• Carbon

• Nitrogen

• boron

• Lithium

• beryllium

• Neon

• oxygen

• fluorine

Clarification

Out of these elements, lithium has the least mass, which is 6.941 units. The element with the most mass on the other hand is neon, which has a mass of approximately 20.1797 units.

Final answer: The element in Period 2 of the Periodic Table with the least mass is lithium.

The correct diagram is W.

A diagram is often a -dimensional display that communicates the use of visual relationships. it is a simplified and dependent visual representation of ideas, ideas, buildings, family members, statistical records, anatomy, etc. it can be used for all elements of human activities to give an explanation for or illustrate a topic. example Diagrams are graphics that show a photo, or photographs, accompanied with the aid of either note, labels, or a legend, which will explain principles or techniques. Describe gadgets or locations.

Display how matters paintings, circulate or change. assist provide extra perception into the issue displayed. A diagram is a drawing that suggests the distinctive parts of something and the way they work collectively. three-Line diagram is part of the detailed design document. Used for manipulating designing circuit diagrams, managing circuits, segment sequencing, differential relay placing, and metering transformer connection. A records chart is a sort of diagram or graph, that organizes and represents a set of numerical or qualitative information.

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Answer: Though a hydrogen atom has only one electron, it contains a large number of shells, so when this single electron jumps from one shell to another, a photon is emitted, and the energy difference of the shells causes different wavelengths to be released... hence, mono-electronic hydrogen has many spectral lines.

Explanation: sry its late

Answer: Your welcome!

Explanation:

The frequency of a line in the hydrogen spectrum is determined by the difference in energy between two energy levels in the hydrogen atom. The energy levels are determined by the electron's angular momentum and can be expressed as the quantum number n. The energy of the lines is then determined by the difference between two energy levels (n1 and n2) and is given by the equation ΔE = hc/λ = (R/n2^2) - (R/n1^2), where R is the Rydberg constant and h is Planck's constant. The frequency of the line is then determined by the equation ν = ΔE/h.

3.08 moles of carbon are in the sample.

What are moles?

A Mole is defined as a chemical unit, defined to be 6.022 x 10 23 ( Avogadro's Constant) entities. In science,  this is often usually molecules or atoms. The mass of a mole is the gram formula mass of a substance.

Their averages are equal

moles of carbons / 5 = moles of o

19/5 = moles of c

3.08 = moles of c

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From concentrated (18 M) sulfuric acid [H2SO4]

To prepare the solution, we dilute 33 mL of 18 M sulfuric acid to 1.00 L.

Molarity (M) = moles solute / Liter solution  

Mass%  = mass solute / mass solution×100

We can calculate the amount of 18 M sulfuric acid that needs to be diluted to 1.000 L from a concentrated solution using the dilution method. When determining the volume of 18 M sulfuric acid required, we arrive at

      V1C1 = V2C2

      V1 = (0.60M H2SO4) (1L) / (18M H2SO4)

      V1 = 0.033L = 33mL

To prepare the solution, we dilute 33 mL of 18 M sulfuric acid to 1.00 L.

A substance's molarity (M) is the volume of solution in which it is present. The amount of a solute in moles per liter of a solution is known as molarity. A solution's molar concentration is another name for molarity.

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Answer:

Create a solution of chloride water and add a colouless solution of potassium iodide... The mixture will turn red-brown because iodine has been displaced proving that it is less reactive than chlorine

Cl2 (aq) + 2KI (aq) --> 2KCl (aq) + I2 (aq)

The solution absorbed the wavelength about (590nm to 560nm), which is appearing in the form of its corresponding color ,i.e.. Violet in the solution.

If a solution is appears violet color,it means its absorbing its complementary colour in the UV - visible region.

Complementary colour can be identified as the pairs showing below,

B ⇔ O
G ⇔ R

V ⇔ Y

From above pair we know that, the solution is absorbing the wavelength corresponding to yellow light and we know that the wavelength of yellow light in the visible spectrum is (590nm to 560nm).

The visible light spectrum is the segment of the electromagnetic spectrum that can visible by human eye. human eye can detect wavelengths in from the range of 380 to 700 nanometres.

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The solution is based on limiting reagent.

Step 1:

The balanced equation is

[tex]2H_{2} (g)+O_{2} (g)[/tex]→[tex]2H_{2} O(l)[/tex]

Here, we are calculating the moles of [tex]2H_{2} O(l)[/tex] from the moles of [tex]H_{2}[/tex] if we consider[tex]O_{2}[/tex] is limiting reagent:

Given that, The mass of [tex]H_{2}[/tex] =0.0333g

We know that,

The moles of [tex]H_{2} =(0.0333g H_{2} )[/tex]×[tex]\frac{1.0 molH_{2} }{2.016 gH_{2} }[/tex][tex]=0.0165 mol H_{2}[/tex]

Moles of [tex]H_{2} O(l) from H_{2} =(0.0165 mol H_{2} )[/tex]×[tex]\frac{2.0 mol of H_{2} O(l)}{2.0 mol H_{2} }[/tex]

                                      =0.0165 mol [tex]H_{2} O[/tex].

Thus, 0.0165 mol[tex]H_{2} O(l)[/tex] is formed from 0.0333 g of hydrogen if we consider[tex]O_{2}[/tex] is limiting reagent.

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The percent relative abundance of Cu-63 is 69.15% and Cu-65 is 30.85%.

The atomic mass is the average mass of an element.

m(Cu) = 63.546 g; the average mass of copper

m(⁶³Cu) = 62.9296 g; average mass of copper-63 (Cu-63) isotope

m(⁶⁵Cu) = 64.9278 g; average mass of copper-65 (Cu-65) isotope

ω(⁶³Cu) = ?; average abundance of isotopes Cu-63

ω(⁶⁵Cu) = 1 - ω(⁶³Cu);  average abundance of isotopes Cu-65

Ar(Cu) = ω(⁶³Cu) × m(⁶³Cu) + ω(⁶⁵Cu) × m(⁶⁵Cu)

63.546 g = ω(⁶³Cu) × 62.9296 g + (1 - ω(⁶³Cu)) × 64.9278 g

63.546 = 62.9296 × ω(⁶³Cu) + 64.9278 - 64.9278 × ω(⁶³Cu)

1.9982ω(⁶³Cu) = 1.3818

ω(⁶³Cu) = 1.4738 ÷ 1.9982

ω(⁶³Cu) = 0.6915 × 100%

ω(⁶³Cu) = 69.15%

ω(⁶⁵Cu) = 100% - 69.15%

ω(⁶⁵Cu) = 30.85%

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