Stoichiometry

Front

What is Stoichiometry?

Back

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

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What is a mole in chemistry?

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A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10²³ particles (atoms, molecules, etc.).

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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 comparing the mole ratio of reactants used in the reaction.

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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, calculated based on stoichiometric ratios.

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How do you calculate percent yield?

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Percent yield is calculated using the formula: (actual yield / theoretical yield) x 100%.

Front

What is the balanced equation for the reaction of aluminum and chlorine?

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2 Al + 3 Cl₂ → 2 AlCl₃.

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What is the significance of a balanced chemical equation?

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A balanced chemical equation ensures that the number of atoms for each element is conserved in a reaction, reflecting the law of conservation of mass.

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How many moles of Fe can be produced from 6 moles of H₂ in the reaction Fe₂O₃ + 3H₂ → 2Fe + 3H₂O?

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4 moles of Fe can be produced.

Front

If 356 g of Cl₂ reacts with 356 g of KBr, how much KCl is produced?

Back

223 g of KCl is produced.

Front

What is the percentage yield if 25.0 g of benzene produces 21.4 g of C₆H₅NO₂?

Back

54.29%.