Question

12. A 0.24 g sample of compound of oxygen and boron was found by analysis to contain 0.096

g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound

by weight.

13. 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?

14. Magnesium and oxygen combine in the ratio of 3 : 2 by mass to form magnesium oxide.

How much oxygen is required to react completely with 12 g of magnesium?​

Answer 1

Answer:

80.00g

Explanation: