A balloon containing 0.56 mole of helium has a volume of 10.0 L. What volume will the balloon occupy if helium is lost and only 0.21 mole remain?

Question

Quizplus · Accepted Answer

The volume of a gas is directly proportional to the number of moles of the gas when the temperature and pressure are held constant (Avogadro's law). The initial condition is 0.56 moles occupying 10.0 L. If the amount of helium changes to 0.21 moles, the volume will change in the same ratio. The calculation is (0.21 moles / 0.56 moles) * 10.0 L = 3.75 L, which rounds to 3.8 L, making option B correct.

A Balloon Containing 0