How many moles of H2O are product from reaction of 355 g of O2?

Answer 1

Balanced equation.

2H2 + O2 -> 2H2O

355 grams O2/32 grams = 11.1 moles O2

check for limiting reactant

11.1 moles O2 (2 mole H2/1 mole O2) = 22.2 mole H2

and H2 has no where near that many moles, so limits and drives reaction

so, as they are one to one......

22.2 moles of H2O are produced

Answer 2

To find the moles of H2O produced, first calculate the moles of O2 present in 355 g using its molar mass. Then, use the mole ratio from the balanced chemical equation of the reaction to determine the moles of H2O produced.