chemistry help!

Question

3 NO2 (g) + H2O (l)  2 HNO3 (aq) + NO (g)

How many grams of HNO3 are produced for every 1.0 mole of NO2 that reacts? (The molecular weight of HNO3 is 63.0 g/mole)

Answer 1

Hello Erica, I'd be happy to help!

The equation is already balanced, so the coefficients can be used to find the molar ratio. For every 3 moles of NO₂ that react, 2 moles of HNO₃ are produced.

1.0 mol NO₂ x 2 mol HNO₃ = 0.667 mol HNO₃

3 mol NO₂

To find the grams of HNO₃ produced use the molecular weight given as 63.0 g/mol

0.667 mol HNO₃ x 63.0 g = 42.0 g HNO₃

mol