Answer/explanation:
To solve this problem, let's look for the number of mole
Number of mole of hydrogen gas = mass / molar mass
= 34.8/ 1.00784 * 2
= 34.8 / 2.01568
= 17.265 mol
To calculate the volume
Number of mole = volume / molar volume
Molar volume at STP is 22.4L/mol
Volume = 17.265 mol * 22.4 L/mol
= 386.736L
