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How many moles of hydrogen react with 4.5 moles of oxygen to synthesize water?

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Answer:

9moles of hydrogen gas

Step-by-step explanation:

To solve this problem, we write the reaction expression first;

2H₂ + O₂ → 2H₂O

We have been given the number of moles of oxygen gas to be:

Number of moles of oxygen gas = 4.5moles

From the balanced reaction expression:

1 mole of oxygen gas reacts with 2 moles of hydrogen gas

4.5moles of oxygen gas will react with 4.5 x 2 = 9moles of hydrogen gas

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