Aballoon contains 0.158 mol of gas and has a volume of 2.46 l. if an additional 0.113 mol of gas is added to the balloon (at the same temperature and pressure), what is its final volume?

Answer is: final volume is 4.21 liters.

Use Avogadro's Law (the Volume Amount Law): If the amount of gas in a container is increased, the volume increases.

The volume-amount fraction will always be the same value if the pressure and temperature remain constant.

V₁ / n₁ = V₂ / n₂.

2.46 l / 0.158 mol =  V₂ / 0.271 mol.

V₂ = 4.21 l.