Question

16 mol of oxygen were react with excess hydrogen gas, how many moles of water would be produced

Answer 1

Answer: 32 moles of water.

Explanation:

The balanced chemical equation for formation of water:

$2H_2+O_2\rightarrow 2H_2O$

As can be seen from the chemical equation, 2 moles of hydrogen react with 1 mole of oxygen to form 2 moles of water.

As it is given that hydrogen is present in excess, hydrogen is the excess reagent and oxygen is the limiting reagent as it limits the formation of product.

According to stoichiometry:

1 mole of Oxygen gives 2 moles of water

Thus 16 moles of oxygen will give=$\frac{2}{1}\times 16=32moles$of water.

32 moles of water will be produced.

Answer 2

2H₂  +  O₂   →   2H₂O

mole ratio of O₂  :  H₂O     is     1  :  2

∴  if moles of O₂ = 16 mol

then moles of H₂O = (16 mol ×  2)

                               =  32 mol