6HCl(aq) + 2A1) -
3H2(g) + 2AlCl3(aq)
1. How many moles of hydrogen are produced from 1.20 moles of aluminum?

1.80 moles of will be produced 1.20 moles of aluminium.

Explanation:

To calculate the moles :

The balanced chemical reaction is:

According to stoichiometry :

2 moles of produce = 3 moles of

Thus 1.20 moles of will produce=  of

Thus 1.80 moles of will be produced 1.20 moles of aluminium.