Mole and Avogadro number, Molar Mass

Front

What is a mole?

Back

A mole is a unit of measurement in chemistry that represents 6.02 x 10^23 particles (atoms, molecules, ions, etc.) of a substance.

Front

What is Avogadro's number?

Back

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

Front

How do you calculate the number of moles from grams?

Back

Number of moles = mass (grams) / molar mass (grams per mole).

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol).

Front

What is the molar mass of Oxygen (O)?

Back

The molar mass of Oxygen (O) is approximately 16 g/mol.

Front

How many grams are in 2 moles of NaCl?

Back

2 moles of NaCl = 2 moles x 58 g/mol = 116 grams.

Front

What is the molar mass of AuCl3?

Back

The molar mass of AuCl3 is 303.3 g.

Front

How many atoms are in 1 mole of NaCl?

Back

1 mole of NaCl contains 6.02 x 10^23 formula units, which includes 1 mole of Na and 1 mole of Cl, totaling 2 moles of atoms.

Front

What is the molar mass of NaCl?

Back

The molar mass of NaCl is 58 grams.

Front

How many moles are in 32 grams of Oxygen (O)?

Back

There are 2 moles in 32 grams of Oxygen (O).