15 cm3 of nitrogen gas reacts with 45 cm3 of hydrogen gas to form 30 cm3 of a gaseous product.
Which equation is the most likely for the reaction?
N2(g)+H2(g)→2NH(g)\text{N}_2\text{(g)} + \text{H}_2\text{(g)} \rightarrow 2\text{NH(g)}N2(g)+H2(g)→2NH(g)
3N2(g)+H2(g)→2N3H(g)3\text{N}_2\text{(g)} + \text{H}_2\text{(g)} \rightarrow 2\text{N}_3\text{H(g)}3N2(g)+H2(g)→2N3H(g)
N2(g)+3H2(g)→2NH3(g)\text{N}_2\text{(g)} + 3\text{H}_2\text{(g)} \rightarrow 2\text{NH}_3\text{(g)}N2(g)+3H2(g)→2NH3(g)
2N2(g)+3H2(g)→2N2H3(g)2\text{N}_2\text{(g)} + 3\text{H}_2\text{(g)} \rightarrow 2\text{N}_2\text{H}_3\text{(g)}2N2(g)+3H2(g)→2N2H3(g)
