Question

If 4g of Hydrogen reacts xg of oxygen to give 36g of water.How much Oxygen was used up in this process.

Answer 1

The amount of oxygen used to produce 36 g of water is 32 g.

Explanation:

The chemical reaction for the formation of water is:

2H₂ + O₂ → 2H₂O

Now,

36 × 1/18 = 2 moles of water

4 g of H₂ × 1/2 = 2 moles of hydrogen

On applying the law of conservation of mass, two moles of hydrogen and 1 mole of oxygen reacts to produce 2 moles of water.

Thus, one mole of oxygen is required to produce 2 moles of water.

1 mole of oxygen × 32 g/mole of water = 32 g of oxygen

Answer 2

Answer:

Explanation:

The chemical reaction for the formation of water is:

2H₂ + O₂ → 2H₂O

Now,

36 × 1/18 = 2 moles of water

4 g of H₂ × 1/2 = 2 moles of hydrogen

On applying the law of conservation of mass, two moles of hydrogen and 1 mole of oxygen reacts to produce 2 moles of water.

Thus, one mole of oxygen is required to produce 2 moles of water.

1 mole of oxygen × 32 g/mole of water = 32 g of oxygen