What volume of hydrogen gas measured at 27celcius and 723 torr may be prepared by the reaction of 8.88 grams of gallium with an excess of hydrochloric acid?

Question

Ga+ HCl ==> GaCl3 + H2

Answer 1

Balance the reaction...

2Ga + 6HCl yields 2GaCl3+2H2

so you get a mole of Hydrogen for each mole of Ga.

How many moles of Gallium is 8.88 grams?

Now, convert that number of moles to volume H2.

Volume= nRT/P

Answer 2

3.29 L H2