Question

Question #066fe

Answer 1

0.341 moles Al makes 0.512 moles `H_2` or 1.024 gm `H_2`

Explanation:

2 moles of Al forms 3 mole of `H_2` i.e.

2 moles Al = 3moles `H_2`

So 1 mole Al = 3/2 moles `H_2`

So 0.341 moles Al will make
`0.341**3/2` moles `H_2` =0.512 moles `H_2`.
Now moles =given wt./molecular wt.
0.512=given wt./2
Given wt.= 1.024 grm `H_2`
0.341 moles of Al makes 1.024 grm `H_2`