Answer : The number of moles of required are 0.835 moles.
Explanation : Given,
Moles of = 1.67 moles
The given balanced chemical reaction is,
By the stoichiometry we can say that, 2 moles of hydrogen gas react with 1 mole of oxygen gas to give 2 moles of water as a product.
From the balanced reaction we conclude that,
As, 2 moles of react with 1 mole of
So, 1.67 moles of react with mole of
Therefore, the number of moles of required are 0.835 moles.