Mole conversions

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, ions, etc.) as there are in 12 grams of carbon-12.

Front

What is Avogadro's number?

Back

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

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is approximately 18.02 g/mol.

Front

How many grams are in 2 moles of NaCl?

Back

To find the mass, use the formula: mass = moles x molar mass. Molar mass of NaCl is 58.44 g/mol, so 2 moles = 2 x 58.44 g = 116.88 g.

Front

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

Back

The mass of one mole of carbon is 12.01 g.

Front

How many molecules are in 1 mole of any substance?

Back

There are 6.02 x 10^23 molecules in 1 mole of any substance.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance by its molar mass.

Front

What is the molar mass of glucose (C6H12O6)?

Back

The molar mass of glucose is approximately 180.18 g/mol.

Front

How many moles are in 50 g of H2O?

Back

Number of moles = mass / molar mass = 50 g / 18.02 g/mol ≈ 2.77 moles.