A sample of hydrogen gas, has a volume of 8.56 L at a temperature 0oC and pressure of 1.5 atm. Calculate the number of moles of hydrogen present in this gas sample ( Assume that the gas behave ideally)

Answers

Answer 1

Answer:

According to ideal gas law, there are 0.00565 number of moles of hydrogen present in the gas sample .

What is ideal gas law?

The ideal gas law is a equation which is applicable in a hypothetical state of an ideal gas.It is a combination of Boyle's law, Charle's law,Avogadro's law and Gay-Lussac's law . It is given as, PV=nRT where R= gas constant whose value is 8.314.The law has several limitations.Ideal gas law was proposed by Benoit Paul Emile Clapeyron in year 1834.It is a thermodynamic equation which has wide applications.

Gases which obey ideal gas law are difficult to exist.

Substituting the values as, P=1.5 atmospheres, V=8.56 L, R=8.314 ,T=0°C=273 K that is , n=PV/RT=1.5×8.56/8.314×273=0.00565 moles.

Thus, there are 0.00565 moles of hydrogen present in the gas sample .

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Answer 2

Answer: p = 1.5atm ≈ 1519.88hPa
V = 8.56L
R = 83.1 [hPa*L] / [mol*K]
T = 0°C =273K

pV = nRT |:RT

n = pV / RT

n = [1519.88hPa*8.56L] / [83.1 [hPa*L] / [mol*K] * 273K]
n ≈ 0.57mol

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Cr(SO4)2

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A 10.0 mL syringe contains 0.10 g of nitrogen gas at 0.0 degrees Celsius. What is the pressure inside the syringe?

Answers

Since the sample inside the syringe is a gas, we assume that it is an ideal gas that is we use the expression PV = nRT. We can easily calculate the pressure as follows:

n = m /MM = 0.10 / 28 = 0.0036 mol

P = nRT / V = 0.0036(0.08206)(273.15) / 0.010
P = 8 atm

Answer:

The correct answer is 8.0 atm.

What part of the atom is responsible for the behavior of the alpha particles?

Answers

Answer:

nucleus

Alpha particles are subatomic fragments consisting of two neutrons and two protons. Alpha radiation occurs when the nucleus of an atom becomes unstable (the ratio of neutrons to protons is too low) and alpha particles are emitted to restore balance.

Explanation:

Which method is appropriate for separating a mixture of iron and aluminum? A. using a magnet B. distillation C. evaporation D. observing different densitie

Answers

Appropriate method for separating a mixture of iron and aluminum is definitely A. using a magnet. If we use the second method we will vaporize either aluminum or iron.
If we used the third method it would change liquid into a gas which is strange according to the task.
And observing (even for a long time) won't help separating.

Which statement describes a property of covalent compounds? They have a high boiling point because of strong intermolecular forces. They have a low boiling point because of weak intermolecular forces. They have a low melting point because of strong intermolecular forces. They have a high melting point because of weak intermolecular forces.

Answers

Answer: Option (b) is the correct answer.

Explanation:

A compound in which atoms share electrons with each other are known as covalent compounds.

Since there are no strong intermolecular force of attraction between the atoms hence, there bond can be easily broken down.

Thus, we can conclude that out of the given options, the statement they have a low boiling point because of weak intermolecular forces.

The correct answer is:

They have a low boiling point because of weak intermolecular forces.

You compare the gas generated from a reaction using two antacid tablets with the gas generated from a reaction using four antacid tablets (consider the antacid to be the limiting reagent). At constant pressure and temperature, how do the volumes of the gases compare?Question 4 options:

The gas generated by four antacid tablets has a greater volume

The gas generated by two antacid tablets has a greater volume

The two reactions produce the same amount of gas

I don't know

Answers

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

At constant pressure and temperature, The gas generated by four antacid tablets has a greater volume. The answer should be the first option.

Answer: The correct answer is the gas generated by four antacid tablets has a greater volume

Explanation:

In the question, it is given that pressure and temperature of the gas remain constant and we need to compare the volume of the gas produced by 4 antacid tablets and 2 antacid tablets.

As, antacid is the limiting reagent. Hence, more the tablets, more gas will be produced.

Hence, more gas will be produced by four antacid tablets than the gas produced by 2 antacid tablets.

To compare the volume, we use Avogadro's Law which states that volume is directly proportional to the number of the gas at constant pressure and temperature.

$V\propto n$ (At constant Temperature and Pressure)

Hence, volume will be greater for the gas produced by four antacid tablets.

Therefore, the correct answer is the gas generated by four antacid tablets has a greater volume

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