The Ideal Gas Law Answers

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:

Temperature is .

Volume is .

Moles are .

Identify the ideal gas law equation.

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

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?

Which variables are unknown?

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

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?

Which variables are unknown?

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