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Balance the equation for the complete combustion of hydrogen.

Complete combustion occurs when there is an abundance of air. So hydrogen must react with oxygen and this produces water:

H+ O2 = H2O

This is the quation, however it is not balanced. There are 2 atoms of oxyen on the left side of the equation and only 1 on the right. 

To solve this we need to double the number of oxygen atoms on the right:

H+ O= 2H2O

This results in another problem. There are now 4 hydrogen molecules on the right and only 2 on the left. To solve this we need to double the number of hydrogen molecules on the left:

2H+ O= 2H2O

Angelica O. GCSE Biology tutor, GCSE Maths tutor, A Level Biology tutor

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