Question

3 NO2(g) + H2O(ℓ) −→

2 HNO3(ℓ) + NO(g)
If 716 L of NO2 gas react with water, what
volume of NO gas will be produced? Assume the gases are measured under the same
conditions.
Answer in units of L.

Answer 1

The balanced equation for the above reaction is as follows;
3NO₂ + H₂O --> 2HNO₃ + NO
stoichiometry of NO₂ to NO is 3:1
molar volume is where 1 mol of any gas occupies a volume of 22.4 L
volume of gas is directly proportional to number of moles of gas.
therefore stoichiometry can be applied for volume as well.
volume ratio of NO₂ to NO is 3:1
volume of NO₂ reacted - 854 L
therefore volume of NO formed - 854 L /3 = 285 L
volume of NO formed - 285 L