How is stoichiometry used to calculate amount of product from amount of reactant?A.The coefficients give the ratio of actual yield to theoretical yield.B.The coefficients give the ratio of grams reactant to grams product.C.The coefficients give the ratio of moles reactant to moles product.D.The coefficients give the ratio of moles product to grams product.
Question
How is stoichiometry used to calculate amount of product from amount of reactant?A.The coefficients give the ratio of actual yield to theoretical yield.B.The coefficients give the ratio of grams reactant to grams product.C.The coefficients give the ratio of moles reactant to moles product.D.The coefficients give the ratio of moles product to grams product.
Solution
Stoichiometry is used to calculate the amount of product from the amount of reactant by using the coefficients in the balanced chemical equation. These coefficients represent the molar ratio between the reactants and products.
So, the correct answer is C. The coefficients give the ratio of moles reactant to moles product.
Here's a step-by-step process:
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Balance the chemical equation: This gives you the stoichiometric ratios of the reactants and products.
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Convert the given amount of reactant to moles: Use the molar mass of the reactant to convert from grams to moles.
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Use the stoichiometric ratio to calculate the amount of product: The balanced chemical equation tells you exactly how many moles of product are produced for every mole of reactant.
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Convert the amount of product to desired units: If you need your answer in grams, use the molar mass of the product to convert from moles to grams.
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