Question

When hydrogen peroxide is decomposed it produced water and oxygen. If you

start with 40g of reactant then how much water, by mass, will be produced?
*

Answer 1

40

Correct option is A)

3dm

3

×

24 dm

3

1 mole

​

=0.125 moles of O

2

​

2H

2

​

O

2

​

⟶2H

2

​

O+O

2

​

2 moles of H

2

​

O

2

​

produces 1 mole of O

2

​

.

0.125 moles of O

2

​

requires 2×0.125 H

2

​

O

2

​

=0.25 moles of H

2

​

O

2

​

Concentration of H

2

​

O

2

​

=

0.1

0.25

​

=2.5 M

Hence, option A is correct.

Step-by-step explanation: