Question

How many moles of oxygen are consumed if 8 moles H2 are used? 2H2 + O2 → 2H2O

Answer 1

Answer:

4 moles

Explanation:

2H2 - O2

2 moles - 1 mole O2

8 moles - 4 MOLE O2

Answer 2

Answer:

Explanation:

The equation shows that:

2 moles of H2 react with 1 mole of O2 in this equation (that is what the numbers in front of the formulae mean) and produce 2 moles of water.

So if 2 moles of H2 react with 1 mole O2 then

8 moles of H2 will require 8/2 moles of O2

= 4 moles O2

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