Molar Mass

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 is molar mass calculated for a compound?

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To calculate the molar mass of a compound, multiply the atomic mass of each element by the number of times that element appears in the compound, then sum all the values.

Front

What is the molar mass of H2?

Back

2 grams.

Front

What is the molar mass of oxygen (O2)?

Back

32 grams.

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What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which is the number of particles (atoms, molecules, etc.) in one mole of a substance.

Front

What is the molar mass of calcium hydroxide, Ca(OH)2?

Back

74 grams.

Front

What is the molar mass of carbon (C)?

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12 grams.

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What is the significance of molar mass in chemistry?

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Molar mass is crucial for converting between grams and moles, allowing chemists to quantify substances in reactions.

Front

How do you convert grams to moles using molar mass?

Back

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

Front

How do you convert moles to grams using molar mass?

Back

To convert moles to grams, multiply the number of moles by the molar mass (in g/mol).