does lead melt in atoms or molecules

Answers

Answer 1

Answer:

Atoms

Explanation:

Answer 2

Answer:

atoms

Explanation:

its right, trust


Related Questions

Which of the following behaves most like an ideal gas at the conditions indicated?
A H2(g) molecules at 10-3 atm and 200°C
B O2(g) molecules at 20 atm and 200°C

Answers

The gas that  behaves most like an ideal gas at the conditions indicated is H2(g) molecules at 10-3 atm and 200°C

What is ideal behavior?

Recall that a gas is said to show an ideal behavior when the pressure of thee gas is low and the temperature of the gas is high. Recall that, at a high temperature and a low pressure, the interaction that exists between the molecules of the gas is decreased as such the molecules of the gas would tend to move faster.

We can see that the hydrogen gas has a lower pressure at the same temperature hence the interaction that is know to exists between the molecules of the gas is minimal.

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The phenolic indicator (ln-OH) has approximately the same pKa as a carboxylic acid. Which H is the most acidic proton in ln-OH? Circle or otherwise indicate the most acidic proton. Explain why that H is the most acidic proton in ln-OH (i.e. what makes its conjugate base well stabilized)?

Answers

The most acidic hydrogen atom is the hydrogen atom that have been bonded to the oxygen atom.

What is an acidic proton?

We say that a proton is an acidic proton if the proton is able to leave very easily from the rest of the compound. We know that there are several factors that could make a proton that is found in a molecule to become a labile or an acidic proton. The acidity of a proton largely stem from the fact that electron density between the hydrogen atom and the atom to which it is bonded is weak. As such, the bond is weakened by the lengthening of the bond and a consequent lability of the attached hydrogen atom as discussed here.

In the compounds as shown, the most acidic proton is the proton that is attached to the oxygen atom. This is because, the extensive conjugation in the molecule withdraws electrons from  the 0-H bond and this makes the hydrogen atom to become labile or acidic.

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Which process is not reversible?Dissolving sugar in water Burning butane in a candle lighterMelting waxExtracting iron metal from iron (III) oxide

Answers

Answer

The process that is NOT reversible is Burning butane in a candle lighter

Explanation

All other processes can be reversed

What is neutralization reaction? Use an example to describe the components of neutralization reaction

Answers

1) Neutralization reaction.

In this type of reaction an acid and a base react to form a salt and water. In the course of the reaction H+ and OH- are produced. Afterward, they combine to produce water.

2) Example.

Acid: HCl

Base: NaOH

Salt: NaCl

[tex]\text{HCl}+\text{NaOH}\rightarrow NaCl+H_2O[/tex]

How many moles of solute are present in 250 mL of 4.00 M HCI?

Answers

Answer:

Answer. There are 0.1 moles of solute in 250 mL of 0.4 M solution.

What is TRUE about expert witnesses?

A.
They offer personal and professional knowledge.

B.
They are not allowed to practice their testimony.

C.
They are required to link all evidence to the crime.

D.
They have all written a book about their area of expertise.

Answers

The true statement about  is expert witnesses that they are required to link all evidence to the crime.

So, option C is correct.

Who are expert witnesses?

An expert witness is described particularly in common law countries such as the United Kingdom, Australia, and the United States, is a person whose opinion by virtue of education, training, certification, skills or experience, is accepted by the judge as an expert.

Expert witnesses are required or expected to to link all evidence to the crime.

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Which subatomic particle is positively charged?ProtonNeutronElectronNone

Answers

Explanation:

A proton is a positively charged subatomic particle.

A neutron is a neutrally charged subatomic particle.

An electron is a negatively charged subatomic particle.

Answer:

The first option is correct.

Suppose 2.68 g of barium acetate is dissolved in 300. mL of a 45.0 m M aqueous solution of ammonium sulfa
Calculate the final molarity of acetate anion in the solution. You can assume the volume of the solution doesn't
acetate is dissolved in it.
Round your answer to 3 significant digits.

Answers

         The term "total moles of a solute contained in a kilogram of a solvent" is used to describe molality. Molal concentration is another name for molality. It is a measurement of a solution's solute concentration.

What is the molarity unit?

  Molarity is a unit of measurement for the concentration of a material in a specific volume of solution (M). The amount of a solute in one liter of solution is known as its molarity. The molarity of a solution is sometimes referred to as its molar concentration.

As a result, we start by assuming that the reaction is finished and that its volume is constant.

The following is the balanced stoichiometric equation:

BaSO4 + 2NH4(CH3COO) = Ba(CH3COO)2 + (NH4)2SO4.

First, we must identify the surplus reactant and the one that the process has entirely consumed.

For Ba(CH3COO)2,

The formula for moles is (Mass/) (Molar Mass)

Mass of barium acetate is 2.68 g.

Molar mass of barium acetate is 255.43 g/mol.

There are 0.0104 moles, or (2.68/255.43), in total.

Number of moles for (NH4)2SO4 = (Concentration in mol/L) (Volume in L)

Ammonium surface concentration in mol/L is 45 M.

(300/1000) x volume in L = 0.3 L

45 divided by 0.3 to equal 13.5 moles.

According to the reaction's stoichiometric balance, 1 mole of Ba(CH3COO)2 produces 1 mole of (NH4)2SO4.

Ba(CH3COO)2 produces 2 moles of NH4(CH3COO) from 1 mole.

Ba(CH3COO)2 will provide 2 0.0591 moles of NH4(CH3COO), or 0.1182 moles of NH4(CH3COO), from 0.0591 moles of Ba(CH3COO)2.

If NH4(CH3COO) has a molarity, give the number of moles. Volume in L

0.1182 moles are the number of moles.

0.3 L is equal to L of the solution.

NH4(CH3COO) has a molarity of (0.01182/0.3) = 0.0394 M.

Consider that 0.0394 M of NH4(CH3COO) likewise contains 0.0394 M of acetate ion because 1 mole of NH4(CH3COO) includes 1 mole of acetate ion.

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strategies for controlling carbon monoxide are in conflict with strategies for controlling oxides of nitrogen .

Answers

Answer:

I do not know how to answer this question. Is it even a question?

Explanation:

What happens when you cover burning candles with different size glass containers?

Answers

Answer:

eventually, they'll always stop burning - how long that takes depends on the glass size

Explanation:

the candle stops burning once it consumes all the oxygen inside the glass. the bigger the glass, the more oxygen there is, but eventually, even that will run out. so, smaller glass means faster, larger slower.

hope that helps

In a lab experiment, 7.97 g of phosphorus reacts with bromine to form 69.65 g of phosphorus tribromide. How much phosphorus tribromide would be formed if 12.05 g of phosphorus reacted with 61.68 g of bromine? answer:______gi put what i got in the image and it is wrong sorry

Answers

1) List the known and unknown quantities.

First experiment:

Reactants

Phosphorus: 7.97 g.

Bromine: excess.

Product

Phosphorus tribromide: 69.65 g.

Second experiment

Reactants

Phosphorus: 12.05 g.

Bromine: 61.68 g.

Product

Phosphorus tribromide: unknown.

2) Write and balance the chemical equation.

[tex]2P+3Br_2\rightarrow2PBr_3[/tex]

3) Convert the masses.

3.1-Convert the mass of P to moles of P.

The molar mass of P is 30.97 g/mol.

[tex]mol\text{ }P=12.05\text{ }g\text{ }P*\frac{1\text{ }mol\text{ }P}{30.97\text{ }g\text{ }P}=0.38909\text{ }mol\text{ }P[/tex]

3.2-Convert the mass of Br to moles of Br.

The molar mass of Br2 is 159.8080 g/mol.

[tex]mol\text{ }Br_2=61.68\text{ }g\text{ }Br_2*\frac{1\text{ }mol\text{ }Br_2}{159.8080\text{ }g\text{ }Br_2}=0.38596\text{ }mol\text{ }Br_2[/tex]

4) Which is the limiting reactant?

4.1-How many moles of Br2 do we need to use all of the P?

The molar ratio between Br2 and P is 3 mol Br2: 2 mol P.

[tex]mol\text{ }Br_2=0.38909\text{ }mol\text{ }P*\frac{3\text{ }mol\text{ }Br_2}{2\text{ }mol\text{ }P}=0.583635\text{ }mol\text{ }Br_2[/tex]

We need 0.583635 mol Br2 and we have 0.38596 mol Br2. We do not have enough Br2. This is the limiting reactant.

4.2-How many moles of P do we need to use all of the Br2?

The molar ratio between Br2 and P is 3 mol Br2: 2 mol P.

[tex]mol\text{ }P=0.38596\text{ }mol\text{ }Br_2*\frac{2\text{ }mol\text{ }P}{3\text{ }mol\text{ }Br_2}=0.25731\text{ }mol\text{ }P[/tex]

We need 0.25731 mol P and we have 0.38909 mol P. We have enough P. This is the excess reactant.

5) Moles of phosphorus tribromide produced from the limiting reactant.

Limiting reactant: 0.38596 mol Br2.

The molar ratio between Br2 and PBr3 is 3 mol Br2: 2 mol PBr2.

[tex]mol\text{ }PBr_2=0.38596\text{ }mol\text{ }Br_2*\frac{2\text{ }mol\text{ }PBr_3}{3\text{ }mol\text{ }Br_2}=0.25731\text{ }mol\text{ }PBr_3[/tex]

6) Conver the moles of Pbr3 to mass of PBr3.

The molar mass of PBr3 is 270.6858 g/mol.

[tex]g\text{ }PBr_3=0.25731\text{ }PBr_3*\frac{270.6858\text{ }g\text{ }PBr_3}{1\text{ }mol\text{ }PBr_3}=69.6502\text{ }g\text{ }PBr_3[/tex]

The mass of PBr3 produced in the reaction is 69.65 g PBr3.

.

How much water needs to be added to a 8.6317 M NaCl solution to obtain a 1.0421 M solution, if you start with 4.7869 liters of solution?

Answers

The amount of water needed to be added to a 8.6317 M NaCl solution to obtain a 1.0421 M solution starting with 4.7869 liters of solution would be 34.8629 L.

Dilution

The problem here has to do with dilution. The dilution principle states that the number of moles of solute in a solution is constant before and after dilution.

In other words, the dilution principle can be mathematically expressed as:

[tex]m_1v_1[/tex] = [tex]m_2v_2[/tex].

Where [tex]m_1[/tex] and [tex]m_2[/tex] are molarities before and after dilution; [tex]v_1[/tex] and [tex]v_2[/tex] are volumes before and after dilution.

In this case:  [tex]m_1[/tex] = 8.6317 M,  [tex]m_2[/tex]= 1.0421 M,  [tex]v_1[/tex]= 4.7869 L. We are to determine v2.

[tex]v_2[/tex] = [tex]m_1v_1[/tex]/ [tex]m_2[/tex]

    = 8.6317x4.7869/1.0421

    = 39.6498 L

If the final volume of the solution is 39.6498 L and the starting volume is 4.7869, then the amount of water needed can be calculated as:

39.6498 - 4.7869 = 34.8629 L

Thus, the amount of water that will be added to the original solution in order to arrive at the diluted solution is 34.8629 L.

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In a different titration, a solid sample containing some Fe2+ ion weighs 1.705g. It requires 36.44 mL, 0.0244 M KMnO4 to titrate the Fe2+ in the dissolved sample to a pink end point.

a. How many moles MnO4 ion are required?
b. How many moles Fe2+ are there in the sample
c. How many grams of Fe are there in the sample?
d. What is the percent Fe in the sample?

Answers

The accurate responses are;

a) Number of moles of permanganate ion = 8.89 * 10^-4 moles

b) Number of moles of iron = 4.4 * 10^-3 moles

c) Mass of iron in the sample = 0.25 g

d) Percentage of iron in the sample = 14.7 %

What is titration?

The term titration refers to the kind of reaction in which the amount of substance can be obtained by the accurate determination of the volumes of the substances that have reacted in the process.

a) The number of moles of the permanganate ion that are involved is obtained from;

36.44 /1000 L * 0.0244 M = 8.89 * 10^-4 moles

b) Given that the reaction is 1:5 in the mole ratio of the permanganate ion and the iron III ion

1 mole of permanganate reacts with 5 moles of iron II

8.89 * 10^-4 moles reacts with 8.89 * 10^-4 moles* 5 moles/ 1 mole

= 4.4 * 10^-3 moles

c) Mass of the iron II ion in the sample = 4.4 * 10^-3 moles * 56 g/mol = 0.25 g

d) Percent of the iron in the sample = 0.25 g/1.705g * 100/1

= 14.7 %

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What is TRUE about expert witnesses?

A.
They offer personal and professional knowledge.

B.
They are not allowed to practice their testimony.

C.
They are required to link all evidence to the crime.

D.
They have all written a book about their area of expertise.

Answers

The statement they offer personal and professional knowledge is TRUE about expert witnesses (Option A).

What is the role performed by witnesses?

The specific role performed by witnesses in a given case is to answer questions associated with a subject matter, which are associated with evidence to confirm or reject a given hypothesis.

Therefore, with this data, we can see that the work performed by witnesses is to provide answers in a given subject matter, which is information that may be used as empirical evidence to confirm or reject a given process.

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Why does an atom want to form an octet or duet?And yes I know these rules and I know that it “wants” a stable electronic configuration and a filled shell.

Answers

Answer

An atom wants to form an octet or duet because an atom always wants to be in the most stable form. For any atom, stability is achieved by following the octet rule or duet rule, which is to say all atoms (with a few exceptions) want 8 electrons (octet) or 2 electrons (duet) in their outermost electron shell just like noble gases.

Help I am not sure how to do this number 8

Answers

Answer: The temperature of the gas sample under the conditions given is 30.313 K

Explanation:

The question requires us to determine the temperature, in Kelvins, of a C2H6 gas sample with the following mass, volume and pressure:

mass of C2H6 = m = 561.51g

volume of gas = V = 47.048L

pressure of gas = P = 100.03 kPa

To solve this problem, we can apply the equation of ideal gases rearranged to calculate the temperature, as shown below:

[tex]PV=nRT\rightarrow T=\frac{PV}{nR}[/tex]

where T is the temperature we want to calculate, P corresponds to the pressure of the gas, V is its volume, n is its number of moles and R is the constant of gases (8.314 kPa.L/mol.K).

Note that the only valye that was not provided by the question was the number of moles. We can determine the number of moles n considering the mass of the sample given (561.51g) and the molar mass of the gas C2H6, which we can determine from the atomic masses of C and H.

The atomic masses of C and H are 12.011 and 1.0078 amu, thus we can calculate the molar mass of C2H6 as:

[tex]molar\text{ mass \lparen C}_2H_6)=2\times12.011+6\times1.0078=30.069g/mol[/tex]

Now that we know the mass of the gas sample (561.51 g) and the molar mas of the gas (30.069 g/mol), we can determine the number of moles of gas as it follows:

[tex]\begin{gathered} number\text{ of moles = }\frac{mass\text{ \lparen g\rparen}}{molar\text{ mass \lparen g/mol\rparen}}\rightarrow n=\frac{m}{M} \\ \\ n=\frac{561.51g}{30.069g/mol}=18.674mol \end{gathered}[/tex]

Therefore, the number of moles of C2H6 gas that we need to consider is 18.674 moles.

Next, we can apply the equation of ideal gases to calculate the temperature of the gas:

[tex]\begin{gathered} T=\frac{PV}{nR} \\ \\ T=\frac{(100.03kPa)\times(47.048L)}{(18.674mol)\times(8.314kPa.L/mol.K)}=30.313K \end{gathered}[/tex]

Therefore, the temperature of the gas sample under the conditions given is 30.313 K.

can someone please help me with 28 A!

Answers

Answer: The answer for 28 A is [tex][He]2s^2 2p^2[/tex]

28 B is [tex]1s^2 2s^2 2p^1[/tex]

Sulfur burns in oxygen to form sulfur dioxide. Write a skeleton equation for this chemical reaction.

Answers

A skeletal chemical equation is a representation of a chemical reaction using chemical formulae of reactants and products.

Sulfur = S

Oxygen = O

Sulfur dioxide = SO2

The skeleton equation is:

[tex]S+O_2\text{ }\Rightarrow SO_2[/tex]

Here the skeleton equation = balanced equation.

what is the molar mass of anhydrous solid, mol

Answers

what is the molar mass of anhydrous solid, mol?

Calcium like to lose how many electron/s to form an ion?Group of answer choices123cannot determine

Answers

Answer: the best option to answer the question is the second one (or letter B), "2"

Explanation:

The question requires us to identify how many electrons a calcium (Ca) atom would lose to form an ion.

We can analyze the electron configuration of Ca to understand how many electrons it would lose.

The atomic number of Ca is 20, thus its electron configuration is as it follows:

[tex]1s^2\text{ 2}s^2\text{ 2}p^6\text{ 3}s^2\text{ 3}p^6\text{ 4}s^2[/tex]

From the electron configuration, we can see that Ca presents 2 electrons in its valence shell (4s2). To achieve stability, it is easier for Ca to lose these two electrons and form a Ca2+ ion.

Therefore, the best option to answer the question is the second one (or letter B), "2".

10. What is the Arrhenious definition for acids and bases? Why do we use thisdefinition?

Answers

ANSWER

Definition of an acid; is a substance that produced hydrogen ions (H+) as the only positive ion when dissolved in water or in an aqueous solution. it increases the concentration of hydrogen ions in an aqueous solution.

Definition of the base; are hydroxide compounds that give hydroxide ion (OH-) on dissociation in water. it increases the concentration of hydroxide ions in an aqueous solution.

Why do we use the definition: it helps us to understand the acid-base properties of substances in an aqueous medium. neutralization, hydrolysis, and strength of acids and bases

EXPLANATION:

Arrhenius defined acid and base in the following way

According to Arrhenius, he defined an acid as a substance that produced hydrogen ions (H+) as the only positive ion when dissolved in water or in an aqueous solution. it increases the concentration of hydrogen ions in an aqueous solution.

[tex]\begin{gathered} \text{According to Arrhenius} \\ HA_{(aq)}\rightleftarrows H^{+_{}}_{(aq)}+A^-_{(aq)} \end{gathered}[/tex]

Bases are hydroxide compounds that give hydroxide ion (OH-) on dissociation in water. it increases the concentration of hydroxide ions in an aqueous solution.

[tex]\text{BOH}_{(aq)}\rightleftarrows B^+_{(aq)}+OH^-_{(aq)}[/tex]

Arrhenius's definition of acid and base is still in use because it helps us to understand the acid-base properties of substances in an aqueous medium. neutralization, hydrolysis, and strength of acids and bases

The local police department just bought a Reflected Ultraviolet Imaging System (RUVIS) device. What is MOST likely the purpose of this purchase?

A.
to test DNA from blood in their lab

B.
to individualize hair samples

C.
to determine if blood is human or animal

D.
to find and process more fingerprints

Answers

A to test DNA from blood in their lab

Answer:

To find a process more fingerprints (A uv imaging is used to capture and detect substances such as sweat which prints on a surface)

How many molecules of carbon dioxide, CO2, comprise 1.22 moles?

Answers

How many molecules of carbon dioxide, CO₂, comprise 1.22 moles?

According to Avogadro's Number we have 6.02 * 10^23 molecules in one mol of molecules. So:

1 mol of CO₂ = 6.02 * 10^23 molecules of CO₂

Then:

1.22 moles of CO₂ * 6.02 * 10^23 molecules of CO₂ / 1 mol of CO₂ = 7.34 * 10^23 molecules of CO₂

There are 7.34 * 10^23 molecules of CO₂ in 1.22 moles of it

Jade throws a horseshoe toward a stake from the same starting point three different times. She tries to throw the horseshoe with the same amount of force each time. Jade measures the distance each horseshoe lands from the stake. Which distances did Jade likely measure?
Responses

100 in., 200 in., 300 in.



5 in., 25 in., 50 in.





2 in., 100 in., 120 in.

11 in., 12 in., 13 in

Answers

Since Jade tried to throw the horseshoe with the same amount of force, the likely distances that Jade measured would be 11 in., 12 in., 13 in. The last option.

Force and distance

The distance that the horseshoe thrown by Jade travels is a measure of the amount of force that she applies. The more the force, the longer the distance.

However, Jade tried to ensure that the same amount of force is used the 3 times she threw the horseshoe. The consequence is that the distance of the horseshoe from the stake will not vary much in all the 3 throws.

If the distances vary significantly, it means the amount of force used by Jade also differs significantly.

Thus, the only distances that could be a reflection of the relatively constant force used by Jade to throw the horseshoe are 11 in., 12 in., 13 in.

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I need help to this problem

Answers

The energy efficiency of this rotating space heater is equal to: C. 64%.

What is energy efficiency?

Energy efficiency can bed defined as a process that involves the use of less energy to provide goods and services or perform the same task. This ultimately implies that, energy efficiency helps to reduce air pollution and degradation of the environment.

How to determine the efficiency of this space heater?

Mathematically, energy efficiency can be calculated by using this formula:

Energy efficiency = WO/WI × 100

Where:

WO represents the output energy.WI represents the input energy.

Note: the amount of energy that was used to produced thermal energy represents the output energy used for heating the room.

Substituting the given parameters into the formula, we have;

Energy efficiency = 896/1,400 × 100

Energy efficiency = 0.64 × 100

Energy efficiency = 64%.

In this context, we can reasonably infer and logically deduce that the space heater's efficiency is equal to 64 percent.

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Complete Question:

A rotating space heater used 1,400 joules of energy while heating a room. Of that total, 896 joules produced thermal energy, 181 joules produced kinetic energy, 203 joules produced light energy, and 120 joules produced sound energy. What is the space heater's efficiency?

O 156.25%

O 36%

O 64%

O 56.25%

Which hydrogen below will have the greatest partial positive charge?Group of answer choicesHIHClHBrHFcannot determine

Answers

The hydrogen bonded to the most electronegative element will have the greatest partial positive charge. This is because electronegativity corresponds to the ability of the nucleus of an atom to attract the electrons involved in a chemical bond.

So the more electronegative, the more partial negative charge the atom will have.

Linus Pauling created a scale of the most electronegative elements, which can be of help in determining the intensity of polarization of different bonds:

F > O > N > C > Br > I > S > C > P > H

In this case, F is the most electronegative element.

So hydrogen will have the greatest partial positive charge bonded to F.

Answer: HF

What is the balanced, net ionic equation for the reaction described below?Aqueous sodium phosphate and aqueous iron (III) chloride react to produce aqueous sodium chloride and solid iron (III) phosphate.

Answers

A net ionic equation is the one that only includes the ions that are involved in the formation of the solid.

According to the information the solid formed is iron (III) phosphate, and the ions involved are Fe3+ and PO43-.

It means that the net ionic equation is:

[tex]Fe_{(aq)}^{3+}+PO_{4(aq)}^{3-}\rightarrow FePO_{4(s)}[/tex]

The correct answer is the second choice.

A reaction between liquid reactants takes place at 28.0 degree celcuis in a sealed, evacuated vessel with a measured volume of 15.0L. Measurements show that the reaction produced 10.0g of dinitrogen difluoride gas.
Calculate the pressure of dinitrogen difluoride gas in the reaction vessel after the reaction. You may ignore the volume of the liquid reactants. Round your answer to 2 significant digits.



Answers

The pressure of N2F2 will be 1.64 atm.

Given data:

Mass of N2F2 = 66 grams

Molar mass of N2F2 = 66 g/mol

Temperature = 28°C = 273 +28 = 301 Kelvin

volume = 15 L.

Gas constant = 0.08206  L*atm/K* mol

Number of moles can be determined by using the formula:

Number of moles = mass of N2F2 / Molar mass of N2F2

Number of moles =  66 g/ 66 g/mol = 1 moles.

Volume can be determined by using the formula:

P*V = n×R×T

where, P is pressure, V is volume, T is temperature.

P = (n×R×T)/ V

P = 1 * 0.08206 * 301 )/15 = 1.6466 atm.

The pressure of the sulfur tetrafluoride gas is 1.64 atm.

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This question is to the Brainly employees: Can you please make it to where it doesn't cover the answer because you have to pay for it. Please and thank you sir or mam.

Answers

Answer:

right

Explanation:

The half-life of phosphorus−33 is 25.0 days. How much of a 2.7−oz sample of phosphorus−33 will remain after 150 days?

Answers

If phosphorus-33 have an half-life of 25 days the amount of phosphorus-33 that will remain after 150 days is 0.042 oz.

What is half-life?

Half-life is the time taken for half the sample of a radioactive substance to decay.

To calculate the amount of phosphorus-33 that will remain after 150 days, we use the formula below.

Formula:

R' = R/[tex]2^{T/t}[/tex]........ Equation 1

Where:

R = Original amount of phosphorus-33R' = Amount of phosphorus-33 that will remain after 150  daysT = Total timet = half-life

From the question,

Given:

R = 2.7 ozT = 150 dayst = 25 days

Substitute these values into equation 1

R' = 2.7/([tex]2^{150/25[/tex])R' = 2.7/[tex]2^{6}[/tex]R' = 2.7/64R' = 0.042 oz

Hence the amount of phosphorus-33 that will remain after 150 days is 0.042 oz.

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Which expression allows us to find the discount amount of ANY price thatis discounted 25%?* David is laying tiles on his kitchen floor. His kitchen measures 16 feet by 20 feet Each tile is a square that measures 2 feet by 2 feet (a) What is the area of his kitchen floor? (b) How many tiles will David need to purchase to cover the floor? One Tile 2 ft 2 ft a. What is pressure? Write down its Sl unit the student council is hosting a drawing to raise money for scholarships. they are selling tickets for $9 each and will sell 900 tickets. there is one $3,000 grand prize, two $400 second prizes, and ten $30 third prizes. you just bought a ticket. find the expected value for your profit. round to the nearest cent. Which of these describes the transformation of triangle ABC shown below?A) reflection across the x-axisB) reflection across the y-axisC) reflection across the line y=xD) translation Math help!!! Only a tutor that can give me answers to 9 and 10!! tell me about your self An experiment was designed to test the hypothesis that peanuts have more energy than a chip. The experiment determines calorimetry of the peanut and the chip, using water to capture the energy of the samples when they were burned. A 10 g sample of chip and a 15 g sample of peanut was burned underneath a metal can that held 50 g of water. A thermometer captured how much the temperature of the water increased. The water increased by 7 degrees for the peanut and 3 degrees for the chip. What error was made?a The temperatures were read wrong. b Different amounts of food samples were used.c The food samples were too similar. d Different amounts of water were used. A 3 kg ball is dropped from a height of 100 m above the surface of Planet Z. If the ball reaches a velocity of 45 m/s in 7 s, what is the balls weight on Planet Z? What is the gravitational field strength on Planet Z? A car is being tested for safety by colliding it with a brick wall.The 1300 kg car is initially driving towards the wall at a speedof 15 m/s, and after colliding with the wall the car movesaway from the wall at 2 m/s. If the car is in contact with thewall for 0.5 s, calculate the average force exerted on the carby the wall. Hallum hardware created flyers to advertise a carpet sale . A portion of the flyer is shown below. Based on the chart, which statement describes the relationship between area and the cost of carpet? when speakers jump back and forth between ideas and ramble, the audience tends to become more confused than informed. which public speaking guideline is not being followed? OrganismsWhat do that provide? Which effect did the Dillingham report have on the American public? Ninety percent of a large field is cleared for planting. Of the cleared land, 50 percent is planted with blueberry plants and 40 percent is planted with strawberry plants. If the remaining 360 acres of cleared land is planted with gooseberry plants, what is the size, in acres, of the original field?* The radius of a circle can be approximated using the expression sqrt(((A)/(3))) where A represents the area . A circular kiddie swimming pool has an area of about 28 square feet . An inflatable full-size circular pool has an area of about 113 square feet , how much greater is the radius of the full-size pool than the radius of kiddie pool? Round to the nearest whole number . Esteban is the operations manager of a clock manufacturing company. He develops a few quality check procedures that would help the workers identify incorrectplacing of clock faces. After discussing with his team, he decides to incorporate these procedures in the work flow. In this scenario, Esteban follows the total qualitymanagement (TQM) approach by using_? A quantity of 3.30 102 mL of 0.500 M HNO3 is mixed with 3.30 102 mL of 0.250 M Ba(OH)2 in a constant-pressure calorimeter of negligible heat capacity. The initial temperature of both solutions is the same at 18.46C. The heat of neutralization when 1.00 mol of HNO3 reacts with 0.500 mol Ba(OH)2 is 56.2 kJ/mol. Assume that the densities and specific heats of the solution are the same as for water (1.00 g/mL and 4.184 J/g C, respectively). What is the final temperature of the solution? If tan A = and tan B=16calculate and simplify the following:?tan(A - B) = + distance of (-5,-3) and (-9,4)