Question

if hydrogen and oxygen combine in the ratio of 1:8 by mass respective form water molecules explain how many moles of water will be formed using 10 moles of hydrogen gas at 5 moles of Oxygen gas

Answer 1

We know that,  1 g of hydrogen reacts with oxygen = 8 g
Therefore,  3 g of hydrogen reacts with oxygen = 8 x 3 = 24 g
Thus, 24 g of oxygen gas would be required to react completely with 3 g of hydrogen gas.

Answer 2

Explanation:

No. of moles of hydrogen = 20 moles. 80 grams of Oxygen reacts with 10 grams of Hydrogen which will give 80 + 10 = 90 g of water.. Hence, number of moles = 5 moles of water.