Question

How many moles of oxygen gas (O2) are required to completely react with 10 moles of hydrogen gas (H2)?

Answer 1

5 moles of oxygen are required.

Step-by-step explanation:

Given data:

Moles of O₂ required = ?

Moles of H₂ present = 10 mol

Solution:

Chemical equation:

O₂ + 2H₂ → 2H₂O

Now we will compare the moles of oxygen and hydrogen.

H₂ : O₂

2 : 1

10 : 1/2×10 = 5 mol

5 moles of oxygen are required.