Question

Q3. When Ig of Hydrogen reacts with 8g of Oxygen 9g of water is formed.
A. What mass of water will be formed when Ig of Hydrogen is allowed to react with 20g
of Oxygen?
B. Which law of chemical combination governs your answer?​

Answer 1

Explanation:

The molecular masses of hydrogen, oxygen and water are 2 g/mole, 32 g/mole and 18 g/mole respectively.

2H

2

+O

2

→2H

2

O

2×2=4 g of hydrogen reacts with 1×32=32 g of oxygen to form 2×18=36 g of water.

Hence,

4

4

=1 g of hydrogen reacts with

4

32

=8 g of oxygen to form

4

36

=9 g of water.

9 grams of water can be produced when 8 g of hydrogen reacts with 8 g oxygen.