A scientist stores a very large number of particles in a container. In order to determine the number of particles, the scientist measures the temperature, pressure, and volume of the container and calculates the moles using the ideal gas law. In order for the calculated value to have the greatest accuracy, the scientist should make sure that (select all the apply)

A the temperature is high
B the volume is high
C the pressure is high
D the ideal gas law is always accurate, the conditions will not matter

Answers

Answer 1

When the temperature and the volume of the gas stored in the container are high then the number of the moles will be measured accurately. Thus, options A and B are correct.

What is the ideal gas law?

The ideal gas law is the establishment of the relation between the elements like the moles, pressure, temperature, and the volume of the gas containing the particle.

The ideal gas states:

PV = nRT

With an increase in the temperature, the number of particles that collides increases as the kinetic energy increases. The particle of the container is more when the volume of the gas is more.

Therefore, in options A and B high temperature and volume increase the accuracy.

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Related Questions

A chemical reaction can be reversed if?

Question 18 options:

The energy of the products is less than the activation energy threshold.


The energy of the products exceeds the activation energy threshold.


The energy of the reactants exceeds the activation energy threshold.


The energy of the reactants is less than the activation energy threshold.

Answers

A chemical reaction can be reversed if the energy of the products exceeds the activation energy threshold.

What are reversible reactions?

Reversible reactions are reactions which can proceed in two directions.

In reversible reactions, reactants can form products and products can also break down to form reactants.

For a chemical reaction to be reversed, the original reaction conditions leading to formation of products are reversed.

Therefore, a chemical reaction can be reversed if the energy of the products exceeds the activation energy threshold.

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i) Explain why chlorine(1) oxide has a low melting point.

Answers

Answer:

Being a covalent compound, the intermolecular forces between the Cl2O molecules are weak and easily overcome. Therefore little heat energy, in terms of low boiling point is involved.

2 HCl (g)
H2 (8)
Cl2 (8)
Is the model a correct representation of a chemical reaction taking place?
No, a chemical reaction always has more products than reactants.
Yes, the model shows atoms rearranging to produce a new compound.
No, a chemical reaction always produces more complex compounds.
Yes, the model shows atoms changing states of matter to form a product.

Answers

Yes. The model represents atoms rearranging to produce a new compound.

What chemical reactions?

They are reactions involving the breakage of bonds and rearrangement of atoms in reactants to form products.

In the model, the bonds between hydrogen and chlorine were broken. Thereafter, each hydrogen and chlorine molecule linked up to form hydrogen chloride.

Thus, the model shows atoms rearranging to produce a new compound.

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The reaction of a quantity of sulfur trioxide with water gives an acid with a volume of 2 l, containing 1.8 mol of the dissolved oxide.

a)Calculate the mass of ammonium sulfate that would be obtained by reacting with ammonia acid.

b)Calculate the CM of the solution with a volume of 100 ml of ammonia (aq) to be added for complete neutralization of the acid solution.​

Answers

Answer :]

A.)Calculate the mass of ammonium sulfate that would be obtained by reacting with ammonia acid.

Correct me if i'm wrong :]

A dunk tank hold 30,533 moles of water? How many grams of water are in the tank?

Answers

The mass of water in the tank, given the data from the question, is 549594 g

What is a mole?

The mole of a substance is related to its mass and molar mass according to the following equation:

Moles =[tex]\frac{mass}{molar \;mass}[/tex]

How to determine the mass of water in the tank

From the question given above, the following data were obtained:

Mole of water = 30533 moles

Molar mass of water = 18 g/mol

Mass of water = ?

The mass of the water can be obtained as follow:

Mass = mole × molar mass

Mass of water = 30533 × 18

Mass of water = 549594 g

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A high temperature reaction vessel is charged with 0.5860 mol of iron powder and 35.1 L of oxygen gas at standard temperature pressure. On heating, the iron and oxygen react according to the balanced reaction below.

4Fe(s) + 3O2(g) ®️ 2Fe2O3(s)

After the reaction vessel is called, and assuming the reaction goes to completion, what volume of oxygen remains?

Answers

Answer: 25.1195 L

Explanation:

Given:

There are 0.5860 mol of Iron powder (Fe)

The volume of oxygen gas at STP is 31.5 L

The volume filled by a gas at STP is approximately 22.71 L

Therefore, the moles of oxygen gas at STP = Volume of oxygen gas at STP/ 22.71

= 35.1/22.71

= 1.5456 mol

The balanced chemical equation given for this reaction is:

4Fe(s) + 3O2 (g) ----> 2Fe2O3 (s)

Dividing the above equation by 2, yields:

2Fe(s) + 3/2O2(g) -------> Fe2O3 (s)

From the equation we see:

2 moles of Fe reacts with 3/2 mole of O2 to give one mole of Fe2O3

Thus, let x moles of O2 react with 0.5860 moles of Fe

0.5860/2=x/3/2

0.5860*3=4*x

x = 1.758/4

x =0.4395 mol

So the remaining moles of oxygen gas = 1.5456 - 0.4395

= 1.1061 mol

Therefore, the amount of oxygen gas, in litres, remaining is = 1.1061*22.71

= 25.1195 L

Potassium fluoride has a solubility of 92 g of KF in 100. g of H₂0 at 18 °C. Determine if
each of the following mixtures forms an unsaturated or saturated solution at 18 C:

a. adding 24 g of KF to 25 g of H₂O


b. adding 47 g of KF to 50. g of H₂O


c. adding 127 g of KF to 150. g of H₂O

Answers

a) In 25 grams of water, the solubility is 92/4 = 23 grams, so adding 24 grams will produce a supersaturated solution.

b) In 50 grams of water, the solubility is 92/2 = 46 grams, so adding 47 grams will produce a supersaturated solution.

c) In 150 grams of water, the solubility is 92(1.5) = 138 grams, so adding 127 grams will produce an unsaturated solution.

True or False?
The same carbon atoms are used repeatedly on Earth.

Answers

Answer:

True

Explanation:

had the same question


Write the ion symbol for an atom with the given number of protons and electrons.
55 protons and 54 electrons

Answers

The element is identified with the number of protons, and the element with 55 protons is Cs.

Since there are 54 electrons, the overall charge is +1, so the answer is [tex]\boxed{\text{Cs}^{+}}[/tex]

The ion symbol for an atom with 55 protons and 54 electrons is [tex]Cs^+[/tex]. In chemistry, a "ion" is a term used to describe an electrically charged particle.

An electrically charged particle is referred to as a "ion" in chemistry. It can be negatively charged (referred to as an anion) or positively charged (referred to as a cation). Ions are created when there is an imbalance between the number of protons and electrons in an atom, which happens when atoms gain or lose electrons. Ions are essential in many chemical processes and are in charge of an electrolytic solution's conductivity. Electric current can flow because in solution, ions are free to travel and carry electrical charges. Ions play an important role in cellular communication and the transport of chemicals through cell membranes in biological systems.

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2C4H10+1302 -> 8CO2 + 10H₂O
If 2.46 g of H₂O are produced by a reaction, how many moles of H₂O are produced?

Answers

Answer:

.137 moles

Explanation:

need to know the molar mass of water which is 18.01528 g/mol

2.46 g of H₂O divided 18.01528 g/mol molar mass H₂O = moles of H₂O

2.46 divided by 18.01528 =

.137 moles

C4H10 is butane

butane is commonly used in cigarette lighters

2C4H10+1302 -> 8CO2 + 10H₂O is the burning of butane

burning butane with oxygen makes carbon dioxide and water

vsumhcwagovau

What types of intermolecular forces are important in controlling bio-molecular structure of proteins?
- H-bonding
- Van der Waals
- Dipole Dipole
- All of the above
- None of the above

Answers

Answer:

What types of intermolecular forces are important in controlling bio-molecular structure of proteins?

hydrogen bond

option a

H - bonding

hope it's helpful thanks

20.0 g of bromic acid, HBrO3, is reacted with excess HBr.

HBrO3 (aq) + 5 HBr (aq) → 3 H2O (l) + 3 Br2 (aq)

If 47.3 g of Br2 is produced, what is the percentage yield of Br2? Round your answer to the nearest whole percent.

Answers

After Rounding off The percentage yield is 64%

What is Percentage Yield ?

It is the ratio of actual yield to theoretical yield multiplied by 100% .

It is given in the question

20.0 g of bromic acid, HBrO3, is reacted with excess HBr.

The reaction is

HBrO₃ (aq) + 5 HBr (aq) → 3 H₂O (l) + 3 Br₂ (aq)

Actual yield = 47.3 grams

Molecular weight of Bromic Acid is 128.91 gram

Moles of Bromic Acid = 20/128.91 = 0.155 mole

Mole fraction ratio of Bromic Acid to Bromine is 1 :3

Therefore for 0.155 mole of Bromic Acid 3 * 0.155 = 0.465 mole of Bromine is produced.

1 mole of Bromine = 159.8 grams of Bromine

0.465 of Bromine = 74.31 grams of Bromine

Percentage Yield = (47.3/74.31)*100 = 63.65 %

After Rounding off The percentage yield is 64% .

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The diameter of a hydrogen atom is 106 pm. Find the length in kilometers of a row of 4.34 x 1023 hydrogen atoms?

Answers

The length in kilometers of a row of 4.34 x 1023 hydrogen atoms is 4.34 x 10¹⁴ km.

Length of the entire hydrogen atoms

The length of the entire hydrogen atom is calculated as follows;

Length of the row = number x diameter of one

Length of the row = 4.34 x 10²³ x 10⁶ x 10⁻¹²

Length of the row = 4.34 x 10¹⁷ m

Length of the row = 4.34 x 10¹⁴ km

Thus, the length in kilometers of a row of 4.34 x 1023 hydrogen atoms is 4.34 x 10¹⁴ km.

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What bonds break in the combustion of butane?

Answers

Activation energy
This barrier is due to the fact that to make CO2 and H2O we have to break 4 carbon-hydrogen bonds and some oxygen-oxygen bonds.

Hope this helps!


ICI(g) + Cl₂(g) → ICl3(s). The AG(f) of ICI(g) is -5.5 kJ/mol and the
AG(f)° of ICl3(s) is -22.59 kJ/mol
What is the AG of the reaction, in kJ/mol?

Answers

Answer:

KJ8RT898TGHO7-6734354546746R476

Explanation:

Calculate the number of moles of hydrogen chloride produced from 10 moles
of hydrogen.
H₂(g) + Cl₂(g) → 2HCl(g)?

Answers

Answer:

20 moles HCl

Explanation:

To find the final answer, you need to use the mole-to-mole ratio (from the equation) to convert from moles H₂ to moles HCl. Make sure to arrange the ratios in a way that allows for the units of H₂ to cancel out.

1 H₂ (g) + Cl₂ (g) --> 2 HCl (g)

10 moles H₂          2 moles HCl
-------------------  x  ---------------------   = 20 moles HCl
                               1 mole H₂

What is known about a reaction with a positive enthalpy?
A. Heat is given off as a product of the reaction.
B. The reaction has a large activation energy.
OC. Heat is required to make the reaction occur.
OD. The reaction will never be spontaneous.

Answers

Answer: C

Explanation:

In endothermic reactions, enthalpy is positive, and in exothermic reactions, enthalpy is negative, So, if enthalpy is positive, then it is an endothermic reaction, and hence is required for the reaction to occur.

Methane has a heat of fusion of 0.84 kJ/mol and a heat of vaporization of 9.2 kJ/mol. Estimate the value for the heat of sublimation.
9.00 kJ/mol
11.0 kJ/mol
8.00 kJ/mol
10.0 kJ/mol
12.0 kJ/mol

Answers

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what are ways in controlling soil applicable in your community​

Answers

Answer:

Some methods of controlling soil erosion.

1) Planting Vegetation. This method involves planting crops with deep roots that can hold the soil in place. ...

2)Contour Farming. ...

3)Applying Mulches. ...

4)Avoiding Overgrazing. ...

5)Reforestation. ...

6)Use Plastic Sheeting. ...

7)Applying Terraseeding Method

what is the difference between s8 and 8 s

Answers

the difference between them is s8 is a molecule of eight sulfur atoms covalently bonded together and 8s is eight separate sulfur atoms.

Which law states that at constant temperature the pressure of a given amount of gas is inversely proportional to the volume of the gas?
A.
Combined gas law
B.
Gay-Lussac’s law
C.
Charles’s law
D.
Boyle’s law
E.
Ideal gas law

Answers

Boyle’s law states that at constant temperature the pressure of a given amount of gas is inversely proportional to the volume of the gas. Hence, option D is correct.

What is Boyle’s law?

The volume of a gas at a constant temperature varies inversely with the pressure exerted on it.

Boyle's law states " The pressure of a gas is inversely proportional to the volume occupied by the gas when the temperature(in kelvins) is held constant ".

[tex]P[/tex] ∝ [tex]\frac{1}{V}[/tex]

[tex]PV =CONSTANT[/tex]

This means that with an increase in the volume of gas the pressure exerted by the gas decreases or vice versa. Here variables were pressure and volume.

[tex]P[/tex] ∝ [tex]\frac{1}{V}[/tex]

Boyle’s law states that at constant temperature the pressure of a given amount of gas is inversely proportional to the volume of the gas. Hence, option D is correct.

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Which of the following stores chemical energy?

A. the bonds of a molecule

B. the nucleus of an atom

C. the density of a substance

D. the temperature of a substance

Answers

Answer:

A: The bonds of a Molecule

Explanation:

A=the bonds of a molecule

Question 17 of 30
For a reaction, AH = -286 kJ. When is the reaction spontaneous?
A. When TAS> 0
B. When TA S= -286 kJ
C. When TAS<-286 kJ
D. When TAS = 2(-286 kJ)

Answers

The reaction is spontaneous when TΔS is greater than zero (TΔS>0).

Spontaneous reaction

A spontaneous reaction is determined by applying Gib's free energy formula as follows;

ΔG = ΔH - TΔS

A reaction is spontaneous when Gib's free energy is negative.

For the given example, the change in enthalpy is negative (-286 kJ), to obtain a negative Gib's free energy, the entropy must be positive.

Thus, the reaction is spontaneous when TΔS is greater than zero (TΔS>0).

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How many moles of aluminum do 6.4×1024 aluminum atoms represent?

Answers

Answer:

11 moles Al

Explanation:

To find the amount of moles, you need to use Avogadro's number to convert the atoms to moles. Since the value you were given has 2 significant figures, the final answer should also have 2 sig figs.

Avogadro's Number:
6.022 x 10²³ atoms = 1 mole

6.4 x 10²⁴ atoms Al                1 moles
----------------------------  x  ------------------------------  = 10.6 moles Al

                                       6.022 x 10²³ atoms

= 11 moles Al

Does a displacement reaction take place in 'magnesium + lead nitrate'? and if so why?

Answers

Answer:

Maybe or maybe not (not sure)

Explanation:

A displacement reaction is a type of reaction where one element is displaced by another from a compound.

In the case of magnesium and lead nitrate, magnesium is more reactive than lead. Therefore, it will displace lead from lead nitrate to form magnesium nitrate and lead.

The reaction can be represented as:

Mg(s) + Pb(NO3)2(aq) → Mg(NO3)2(aq) + Pb(s)


Another answer could be;

A displacement reaction does not take place in 'magnesium + lead nitrate' because magnesium is more reactive than lead.

You have now identified whether crabs are able to see plankton they eat near the ocean floor. Based on your answer, explain how this information can be used to help the Australian Institute of Marine Biology further to understand the environment of the ocean floor (what other organisms live at the bottom? How are these able to see their food/ attract food to survive?

Answers

They are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.

How this information can be used to help to understand the environment of the ocean floor?

This information can be used to help the Australian Institute of Marine Biology further to understand the environment of the ocean floor because they are able to see the seas floor and can find out other creatures as well.

So we can conclude that they are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.

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For an atom electrons, how many energy sublevels are present in the principal energy level n = 4?

Answers

There are 4 energy sublevels are present in the principal energy level n = 4.

What is sublevels?

Sub-level is a type of level that is lower than another level or it is a part or component of a big level. S, p, d and f are the four energy levels in which electrons are present.

So we can conclude that 4 energy sublevels are present in the principal energy level n = 4.

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ASAP PLS 100 POINTS Which statement best describes the role of oxygen in cellular respiration?
A. Oxygen molecules are a waste product of electron flow.
OB. Oxygen molecules form as ATP molecules are made.
OC. Oxygen molecules form as sugar molecules are broken down.
OD. Oxygen molecules are used to make water molecules.

Answers

It’s A .. I think I hope this helps !

Answer:

Option C

Explanation:

Oxygen molecules form as sugar molecules are broken down.

Sugar or carbohydrates are known as glucose or sucrose and malltose i.e C6H12O6 etc.

So they are broken down by cellular respiration and forms Oxygen for cells

The parent element 42 19 K decays by beta decay. Which daughter element will
form?
O A. Ca
OB. 1 Ar
O C. C
OD. K

Answers

Answer: A

Explanation:

This means that the atomic number decreases by 1 but the mass remains constant, meaning the atomic number of the new element is 20. This corresponds to calcium.

The specific heat of aluminum is approximately
0.90 J/g °C. How much heat energy would be
required to raise the temperature of a 50 g
sample of aluminum from 20 °C to 100 °C?

Answers

Answer:

3600J

Explanation:

Q = mc∆T

= 50 x 0.9 x (100 - 20)

= 3600J

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