Answer to Question #30673 in Chemistry for Kel

Question

Nitric acid is formed by the reaction of nitrogen dioxide with water. How many moles of water are needed to react with 8.4 mol of nitrogen dioxide?

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

Answer 1

Accordinng to the equation
3NO₂(g) + H₂O(l)------> NO(g) + 2HNO₃(aq)
we can find the amount of substance of water:
n(NO₂) : n(H₂O) = 1:3;
n(H₂O) = n(NO₂)*1/3
If the amount of substance of nitrogen dioxide is 8.4 mol
n(H₂O) = 8.4*1/3
n(H₂O) = 2.7 moles

Answer: 2.7 moles