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If the reaction is

2H2 + O2 = 2H20

then varying the ratio doesn't really affect the reaction. Let's throw out a ratio...you've got 20 moles of H2 and 10 moles of O2, which will give you 20 moles of water. If you were to change that to 20 moles of H2 and 15 moles of O2, you're still going to get 20 moles of water...but you'll have five moles of O2 left over that can't react with anything because there's no hydrogen left. Conversely, if you have an overage of hydrogen you will theoretically be left with excess hydrogen...the reality of hydrogen is it's reactive enough it will go out looking for something to do, and you'll get a second compound.

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How can one determine the mole ratio in a chemical reaction?

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Related Questions

How do you determine the mole ratio in a chemical reaction?

To determine the mole ratio in a chemical reaction, you look at the coefficients of the balanced chemical equation. The coefficients represent the number of moles of each substance involved in the reaction. The ratio of these coefficients gives you the mole ratio.


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An unbalanced chemical equation does not accurately reflect the ratio of reactants and products in a chemical reaction, which can affect the stoichiometry of the reaction. Balancing the equation is necessary to ensure that the law of conservation of mass is obeyed and to correctly represent the chemical species involved in the reaction.


How can one determine the mole ratio in a chemical reaction?

To determine the mole ratio in a chemical reaction, you can use the coefficients of the balanced chemical equation. The coefficients represent the number of moles of each substance involved in the reaction. By comparing the coefficients of the reactants and products, you can determine the mole ratio between them.


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