Question

what is the total number of oxygen atoms on the left - hand side of this chemical equation?
3no₂(g) + h₂o(l) → 2hno₃(aq) + no(g)

Explanation:

Step1: Calculate O in \(3NO_2\)

Each \(NO_2\) has 2 O atoms. For 3 moles: \(3\times2 = 6\) O atoms.

Step2: Calculate O in \(H_2O\)

\(H_2O\) has 1 O atom. So: \(1\times1 = 1\) O atom.

Step3: Sum the O atoms

Total O on left: \(6 + 1 = 7\)

Answer:

7