Unit 5 Review - Stoichiometry

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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.

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What does the Law of Conservation of Mass state?

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The Law of Conservation of Mass states that in a closed system, the mass of reactants is equal to the mass of products in a chemical reaction.

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What is a mole ratio?

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A mole ratio is a ratio that relates the amounts in moles of any two compounds involved in a chemical reaction.

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What is theoretical yield?

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Theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, calculated based on stoichiometric principles.

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What is actual yield?

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Actual yield is the amount of product that is actually obtained from a chemical reaction, which may be less than the theoretical yield due to various factors.

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What is percentage yield?

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Percentage yield is a measure of the efficiency of a reaction, calculated as (actual yield / theoretical yield) x 100%.

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How do you calculate the mass of a reactant needed for a reaction?

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To calculate the mass of a reactant needed, use the mole ratio from the balanced equation and convert moles to grams using the molar mass.

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What is the significance of STP in gas reactions?

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STP (Standard Temperature and Pressure) is used as a reference point for gas calculations, defined as 0 degrees Celsius and 1 atmosphere pressure.

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How do you convert grams to moles?

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To convert grams to moles, divide the mass of the substance by its molar mass (grams/molar mass = moles).

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What is the balanced equation for the combustion of B2H6?

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The balanced equation for the combustion of B2H6 is: B2H6 + 3O2 → 2HBO2 + 2H2O.