Question

How many moles of oxygen (O2) are required to completely react with 27.4 mol of H2

Equation: 2H2+O2----->2H20

Answer 1

Balanced chemical equation

2 H2 + O2 = 2 H2O

2 moles H2 ----------- 1 mole O2
27.4 moles H2 ------ moles O2

moles O2 = 27.4 * 1 / 2

moles O2 = 27.4 / 2 => 13.7 moles

Answer 2

Answer : The number of moles of oxygen gas required are 13.7 moles.

Explanation : Given,

Moles of
`H_2` = 27.4 moles

The given balance chemical reaction is:

`2H_2+O_2\rightarrow 2H_2O`

From the balanced chemical reaction we conclude that,

As, 2 moles of
`H_2` react with 1 mole of
`O_2`

So, 27.4 moles of
`H_2` react with
`(27.4)/(2)=13.7` mole of
`O_2`

Therefore, the number of moles of oxygen gas required are 13.7 moles.