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 balanced chemical equations.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring the law of conservation of mass is followed.

Front

What are mole ratios?

Back

Mole ratios are the ratios of the amounts in moles of any two compounds involved in a chemical reaction, derived from the coefficients of a balanced chemical equation.

Front

How do you determine the coefficients needed to balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides.

Front

What is the significance of the coefficients in a balanced equation?

Back

Coefficients indicate the relative number of moles of each substance involved in the reaction, allowing for stoichiometric calculations.

Front

How many moles of oxygen are produced from the decomposition of 2 moles of KClO3?

Back

According to the equation 2KClO3 → 2KCl + 3O2, 2 moles of KClO3 produce 3 moles of O2, so 2 moles of KClO3 produce 3 moles of O2.

Front

What is the molar mass of KClO3?

Back

The molar mass of KClO3 is approximately 122.55 g/mol (K: 39.10, Cl: 35.45, O: 16.00 x 3).

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance (grams = moles x molar mass).

Front

What is the relationship between moles and mass in stoichiometry?

Back

In stoichiometry, the relationship between moles and mass is defined by the molar mass, which allows for conversions between the two.

Front

What is the first step in solving a stoichiometry problem?

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The first step is to write and balance the chemical equation for the reaction.