The Ideal Gas Law

Question 1

A balloon containing helium gas expands from 230 mL to 860 mL as more helium is added. What was the initial quantity of helium present if the expanded balloon contains 3.8 × 10 mol, assuming constant temperature and pressure?Use the formula:

Revolt · Accepted Answer

A: 1.0 × 10 mol

Question 2

Use your understanding of the ideal gas law to identify the correct relationships among the variables. Pressure is .

Revolt · Accepted Answer

C: inversely related to volume

Question 3

How many moles of oxygen must be placed in a 3.00 L container to exert a pressure of 2.00 atm at 25.0°C?Formula: PV = nRT(R = 0.0821 Latm/molK) Which variables are given?

Revolt · Accepted Answer

A: pressure; B: volume; C: temperature

Question 4

Which variables are unknown?

Revolt · Accepted Answer

D: moles

Question 5

Select the correct algebraic form for the equation to be used for this calculation.

Revolt · Accepted Answer

B:

Question 6

A sample of gas contains 6.25 × 10-3 mol in a 500.0 mL flask at 265°C. What is the pressure of the gas in kilopascals?Formula: PV = nRT(R = 8.31 LkPa/molK)Which variables are given?

Revolt · Accepted Answer

B: volume; C: temperature; D: moles

Question 7

Which variables are unknown?

Revolt · Accepted Answer

A: pressure

Question 8

Select the correct algebraic form for the equation to be used for this calculation.

Revolt · Accepted Answer

C:

Question 9

Temperature is .

Revolt · Accepted Answer

C: inversely related to moles

Question 10

Volume is .

Revolt · Accepted Answer

B: inversely related to pressure

The Ideal Gas Law Answers

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