Question

In CO2, carbon and oxygen are present in the ratio 3: 8. If 6 g of carbon is made to react with 150 g of
oxygen, how much carbon dioxide will be produced?


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Answer 1

Answer:

C+O2→CO2

3g 8g 11g

Total mass of reactants = mass of carbon + mass of oxygen =3+8=11g

Total mass of reactants = Total mass of products

Hence, the law of conservation of mass is proved.

Further, it also shows carbon dioxide contains carbon and oxygen in a fixed ratio by mass, which is 3:8.

Thus it also proves the law of constant proportions. 3 g of carbon must also combine with 8 g of oxygen only.

This means that (50−8)=42g of oxygen will remain unreacted.