Question

Hydrogen and oxygen react chemically to form water. How much water would form if 84.8 grams of
hydrogen reacted with 54.8 grams of oxygen?

Answer 1

If 84.8 grams of hydrogen reacted with 54.8 grams of oxygen 61.65 grams of water will be formed.

Explanation:

2H2+O2----------->2H2O.

• From the above equation, we can say that 4g of Hydrogen will react with 32 g of oxygen.

• In this question, Hydrogen is in excess amount. 32 g of Oxygen will react with 4 g of H2.

• Therefore 54.8g of Oxygen will react with =54.8x4/32= 6.85 g H2.

• The remaining 77.95g of H2 will be left unreacted.

• Therefore the amount of water formed=(54.8+6.85)=61.65 g