1 litre of CO₂ is passed through red hot coke.The volume becomes 1.4 litres at some temperature and pressure.what will be the composition of the product?

can you please expain it more clearly

Start by writing the balanced chemical equation that describes this reaction CO 2 ( g ) + C ( s ) → 2 CO ( g ) Now, notice that every mole of carbon dioxide that takes part in the reaction produces 2 moles of carbon monoxide. This implies that if the sample of carbon dioxide would react completely, you would end up with 2 L of carbon monoxide--keep in mind that when working with gases kept under the same conditions for pressure and temperature, their mole ratio is equivalent to a volume ratio. In your case, the resulting gaseous mixture has a volume of 1.4 L , so you know for a fact that the carbon dioxide was not completely consumed. If you take x L to be the volume of carbon dioxide consumed by the reaction, you can say that 2 x L will be the volume of carbon dioxide produced by the reaction. This means that after the reaction is complete, you will be left with volume of unreacted CO 2  ( 1 − x ) . L + volume of CO produced  ( 2 x ) . L = 1.4 L This will get you 1 + x = 1.4 ⇒ x = 0.4 Therefore, you can say that the resulting mixture will contain ( 1 − 0.4 ) . L = 0.6 L → CO 2 ( 2 ⋅ 0.4 ) . L = 0.8 L → CO