Molar Mass

Front

What is Molar Mass?

Back

The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.

Front

How do you calculate the molar mass of a compound?

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To calculate the molar mass, identify the number of each type of atom in the compound, multiply by the atomic mass of each element, and sum the total.

Front

Calculate the molar mass of NH4NO2.

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64 g NH4NO2 per 1 mol.

Front

What is the percent composition of an element in a compound?

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The percent composition is the percentage by mass of each element in a compound, calculated by dividing the mass of the element by the total molar mass of the compound and multiplying by 100.

Front

Calculate the percent composition of Oxygen in C6H12O6.

Back

53.3%.

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If the molar mass of Cu2O is 143 g/mol, what is the percentage composition of Cu?

Back

88.8%.

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Calculate the molar mass of KOH.

Back

56 g KOH per 1 mol.

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What is the molar mass of Al(OH)3?

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78.0 g Al(OH)3 per 1 mol.

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What is the atomic mass of Carbon (C)?

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The atomic mass of Carbon is approximately 12.01 g/mol.

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What is the atomic mass of Hydrogen (H)?

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The atomic mass of Hydrogen is approximately 1.01 g/mol.