If there are 1.60 moles of H , how many moles of each of the compounds are present

Question

H2SO4:

C2H4O2:

NaOH

Answer 1

H2SO4 : 1.6 mol H x 1 mol H2SO4/2 mol H = 0.8 mol H2SO4

C2H4O2 : 1.6 mol H x 1 mol C2H4O2/4 mol H = 0.4 mol C2H4O2

You can now do the same process for NaOH

Answer 2

The total number of atoms of hydrogen in the three compounds is 7. ( 2 in H2SO4, 4 in C2H4O2 and 1 in NaOH). Divide 1.6 by 7 to have 0.2286. Thus to 2 significant figures there are 0.23 of each.