Suppose you wanted to dissolve an aluminum block with a mass of 15.4 g

Question

What mass of H2 gas (in g) would be produced by the complete reaction of the aluminum block?.

Answer 1

2Al + 6HCl ==> 2AlCl3 + 3H2

Convert 15.4 g Al to moles. moles = grams/molar mass
Convert moles Al to moles H2 using the coefficients in the balanced equation.
Convert moles H2 gas to grams. grams = moles x molar mass.

Answer 2

47