Molar Mass and Mole

Front

What is the definition of a mole?

Back

A mole is a unit of measurement in chemistry that represents 6.022 x 10^23 particles (atoms, molecules, ions, etc.) of a substance.

Front

How do you calculate molar mass?

Back

Molar mass is calculated by summing the atomic masses of all the atoms in a molecule, expressed in grams per mole (g/mol).

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is approximately 18 g/mol.

Front

How many molecules are in one mole of a substance?

Back

One mole of a substance contains 6.022 x 10^23 molecules.

Front

What is the formula to convert grams to moles?

Back

Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of aluminum (Al)?

Back

The molar mass of aluminum is 27 g/mol.

Front

How do you find the percentage composition of an element in a compound?

Back

Percentage composition = (mass of element in 1 mole of compound / molar mass of compound) x 100%.

Front

What is the molar mass of calcium carbonate (CaCO3)?

Back

The molar mass of calcium carbonate is 100 g/mol.

Front

How many moles are in 30 grams of sodium (Na)?

Back

There are approximately 1.3 moles of sodium in 30 grams.

Front

What is the mass of one mole of carbon (C)?

Back

The mass of one mole of carbon is 12 g.