To form 4.5 grams of H2O, how many grams of N2O5 are needed

Answer 1

I'm assuming this is the reaction to form nitric acid, which in this case, the balanced chemical equation would be:

N₂O₅ + H₂O → 2HNO₃

Since we know we want to use 4.5 g of H₂O, we can use this number and our balanced chemical equation to get the mass of N₂O₅:

4.5 g H₂O x (1 mol H₂O/18 g H₂O) x (1 mol N₂O₅/1 mol H₂O) x (108 g N₂O₅/1 mol N₂O₅) =

27 g N₂O₅