Question

2HNO3+Mg(OH2)->2H2O+Mg(NO3)2
How many moles of H2O will be produced when 1.78 moles of HNO3 react?

Answer 1

8 mol HNO3 x (1 mol Mg(NO3)2/2 mol HNO3) x
(148.30 g Mg(NO3)2/1 mol Mg(NO3)2) = 593.2 g Mg(NO3)2

Answer 2

From the stoichiometry of the reaction, 2 moles of HNO3 gives 2 moles of H20.
So 1.78 moles of HNO3 gives 1.78 moles of H2O