Moles

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

How many particles are in one mole of a substance?

Back

6.02 x 10^23 particles, known as Avogadro's number.

Front

What is the molar mass of a substance?

Back

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

Tags

NGSS.HS-PS1-7

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all the atoms in the compound's formula.

Front

What is the molar mass of Na2SO4?

Back

142.04 g/mol.

Front

What is the molar mass of PbSO4?

Back

303.27 g/mol.

Front

What is the molar mass of Iron (Fe)?

Back

55.93 g.

Front

What is the significance of Avogadro's number?

Back

Avogadro's number allows chemists to convert between moles and the number of particles.

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance.

Front

If you have 7.00 moles of Na2SO4, how many grams do you have?

Back

994 grams.