OL Moles and Stoichiometry Review

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What is a mole in chemistry?

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A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

Front

What is stoichiometry?

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Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the conservation of mass.

Front

What is the balanced equation for the reaction of ammonia and nitrogen monoxide?

Back

4NH₃(g) + 6NO(g) → 5N₂(g) + 6H₂O(g)

Front

How do you determine the limiting reactant in a chemical reaction?

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The limiting reactant is the substance that is completely consumed first in a chemical reaction, limiting the amount of product formed. It can be determined by calculating the moles of each reactant and comparing their ratios based on the balanced equation.

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What is the theoretical yield?

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The theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, as calculated from the balanced chemical equation.

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How do you calculate moles from grams?

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To calculate moles from grams, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of ammonia (NH₃)?

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The molar mass of ammonia (NH₃) is approximately 17.03 g/mol.

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What is the concept of excess reactant?

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The excess reactant is the substance that remains after a chemical reaction has gone to completion. It is not completely consumed.

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How do you convert moles of one substance to moles of another in a reaction?

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Use the mole ratio from the balanced chemical equation to convert moles of one substance to moles of another.

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What is the formula to calculate the number of grams from moles?

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To calculate grams from moles, use the formula: Mass (g) = Moles × Molar Mass (g/mol).