Question

Dihydrogen sulfide reacts with oxygen gas to form sulfur dioxide and water. How many moles of oxygen gas will react when 0.6469 moles of water are formed?

Answer 1

Answer: 0.9704 moles of
`O_2` will react when 0.6469 moles of water are formed.

Step-by-step explanation:

The balanced chemical reaction is:

`2H_2S+3O_2(g)\rightarrow 2SO_2+2H_2O`

According to stoichiometry :

2 moles of
`H_2O` are formed from = 3 moles of
`O_2`

Thus 0.6469 moles of
`H_2O` are formed from =
`(3)/(2)* 0.6469=0.9704moles` of
`O_2`

Thus 0.9704 moles of
`O_2` will react when 0.6469 moles of water are formed.