Question

What volume of oxygen reacts with 60cm^3methane and what volume of carbondioxice is produced if all volumes are measured at the same temperature and pressure

Answer 1

the unbalanced equation
\[{CH_4}_{(g)}+{O_2}_{(g)} \rightarrow {CO_2}_{(g)}+H_2O_{(g)} \]

Answer 2

(assuming complete combustion)

Balancing
\[ {CH_4}_{(g)}+2{O_2}_{(g)} \rightarrow {CO_2}_{(g)}+2H_2O_{(g)} \]

Answer 3

Volumes of gasses measured under the same Temperature and Pressure
will have the same number of molecules.

so \[60cm^3 \text{ of } CH_4\]\[120cm^3 \text{ of } O_2\]\[60cm^3 \text{of } CO_2\]\[60cm^3 \text{ of } O_2\]