Answer : The correct option is, 13.7 mole
Solution : Given,
Moles of [tex]H_2[/tex] = 27.4 moles
The given balanced chemical reaction is,
[tex]2H_2+O_2\rightarrow 2H_2O[/tex]
From the balanced chemical reaction, we conclude that
As, 2 moles of [tex]H_2[/tex] react with 1 moles of [tex]O_2[/tex]
So, 27.4 moles of [tex]H_2[/tex] react with [tex]\frac{27.4}{2}=13.7[/tex] moles of [tex]O_2[/tex]
Therefore, the number of moles of oxygen [tex]O_2[/tex] required are, 13.7 moles
