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Use the balanced equation below

O2 + 2H2 ----> 2H2O

1. How many moles of hydrogen are needed to complete the reaction?

2. If 3.0 moles of oxygen are present with excess hydrogen, how many moles of water are formed?

Respuesta :

You know oxygen is the limiting reactant (since it says there is excess hydrogen). So, use stoichiometry based on the given number of oxygen moles:

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