Question

when 3.0g of carbon is burnt in 8.00g of oxygen ,11.00g of carbon dioxide is produced .what mass of carbon dioxide will be formed when 3.00g of carbon is burnt in 50.00g of oxygen?which law of chemical combination will govern your answer?​

Answer 1

Answer:

53.00 g ; Law of conservation of mass

Explanation:

c+o2 gives co2

1. 3.0 +8.00 gives 11.00 g co2

2. 3.00 +50.00 gives 53 g co2

Answer 2

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.