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.

Front

What is the molar mass of a compound?

Back

The molar mass of a compound is the mass of one mole of that compound, expressed in grams per mole (g/mol).

Front

How do you calculate the molar mass of C6H12O6?

Back

To calculate the molar mass of C6H12O6, sum the molar masses of all atoms: (6*12.01 g/mol for C) + (12*1.01 g/mol for H) + (6*16.00 g/mol for O) = 180.18 g/mol.

Front

What is the relationship between moles and atoms?

Back

1 mole of any substance contains Avogadro's number of particles (atoms, molecules, etc.), which is approximately 6.022 x 10^23.

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, reflecting the conservation of mass.

Front

How many moles of H2 are needed to react with 2 moles of N2 in the equation N2 + 3H2 → 2NH3?

Back

6 moles of H2 are needed to react with 2 moles of N2.

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What is the stoichiometric coefficient?

Back

The stoichiometric coefficient is the number in front of a compound in a balanced equation that indicates the relative number of moles of that substance.

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How do you convert grams to moles?

Back

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

Front

What is the mole ratio?

Back

The mole ratio is the ratio of moles of one substance to moles of another substance in a balanced chemical equation.

Front

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

Back

4 moles of Fe can be produced from 6 moles of H2.