Help please I hate chem

Question

In the synthesis of water from its elements, what is the total number of grams of oxygen gas needed to produce 54 grams of water?

Answer 1

2H₂(g) + O₂(g) ==> 2H₂O ... balanced equation

molar mass H₂O = 18 g/mol

molar mass O₂ = 32 g /mol

54 g H₂O x 1 mol H₂O / 18 g x 1 mol O₂ / 2 mol H₂O x 32 g O₂ / mol O₂ = 48 g O₂

PS. I, too, hate chem.