Question

calculate calculate the mass of carbon which combines with 80 gram of oxygen in CO and co2 (according to the law of constant proportion)​

Answer 1

Question

Bookmark

When 3.0 g of carbon is burnt in 8.00 g oxygen, 11.00 g of carbon dioxide is produced? What mass of carbon dioxide will be formed when 3.00 g of carbon is burnt in 50.00 g of oxygen? Which law of chemical combination will govern your answer?

Hard

Solution

C+O

2

→CO

2

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