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In the formation of carbon dioxide (CO2) from carbon monoxide (CO) and oxygen (O2), how many moles of carbon monoxide are needed to react completely with 7.0 moles of oxygen gas

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Answer:

14 moles of CO are needed in the reaction, to react with 7 moles of O₂

Explanation:

We need to determine the reaction to start:

O₂ (g) + 2CO (g) → 2CO₂ (g)

Now, we state the ratio of reactants:

1 mol of oxygen needs 2 moles of CO, to react and they both, produce 2 moles of CO₂. Therefore the ratio is 1:2

We can make a rule of three to reach the answer:

1 mol of O₂ needs 2 moles of CO to react

Therefore, 7 moles of O₂ must need (7 .2) /1 = 14 moles

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