Moles @ Mass

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

Front

What is molar mass?

Back

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 of a compound, add together the molar masses of each element in the compound, multiplied by the number of times each element appears in the formula.

Front

What is the molar mass of water (H₂O)?

Back

The molar mass of water is approximately 18 g/mol (2*1 g/mol for H + 16 g/mol for O).

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What is the mass of one mole of sodium chloride (NaCl)?

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The mass of one mole of sodium chloride is approximately 58.5 g (23 g/mol for Na + 35.5 g/mol for Cl).

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How many grams are in 3 moles of carbon dioxide (CO₂)?

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There are 132 g in 3 moles of carbon dioxide (3 moles * 44 g/mol).

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What is Avogadro's number?

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Avogadro's number is 6.022 x 10²³, which is the number of atoms, molecules, or particles in one mole of a substance.

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What is the mass of 1 mole of gold (Au)?

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The mass of 1 mole of gold is approximately 197 g.

Front

How do you convert moles to grams?

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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 mass of 0.5 moles of oxygen gas (O₂)?

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The mass of 0.5 moles of oxygen gas is 16 g (0.5 moles * 32 g/mol).