Question

one litre CO2 is pased over a hot cake the volume become 1.4ltr the composition of product is​

Answer 1

Start by writing the balanced chemical equation that describes this reaction

CO2(g)+C(s)→2CO(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 Litres 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 Liters, so you know for a fact that the carbon dioxide was not completely consumed.

If you take x Liters to be the volume of carbon dioxide consumed by the reaction, you can say that 2x Liters

will be the volume of carbon dioxide produced by the reaction.

This means that after the reaction is complete, you will be left with

1+x=1.4⇒x0.4

Therefore, you can say that the resulting mixture will contain

(1−0.4).L=0.6→CO2(2.0.4).L=0.8 L →CO