An aluminum of mass 3.14gramm reacted with excess hydrochloride acid at stp according to the the following equation calculate the mass of hydrogen and the volume at stp

1 answer

how many moles of Al do you have?
2Al + 6HCl = 2AlCl3 + 3H2
So, you get 3 moles of H2 for every 2 moles of Al
Now use the fact that 1 mole of a gas occupies 22.4L at STP.