11. Two balloons, one containing 1.54 L hydrogen gas and the other containing 0.72 L of

helium gas, are at the same pressure and temperature conditions. If the second balloon

contains 0.100 mol of helium, then the mass of hydrogen gas in the first balloon is:

A. 0.43 g

B. 0.22 g

C. 0.094 g

D. 0.047 g