Moles

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10^23 particles (atoms, molecules, ions, etc.).

Front

How many atoms are in 1 mole of any substance?

Back

1 mole of any substance contains 6.022 x 10^23 atoms.

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 convert moles to grams?

Back

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

Front

What is the molar mass of Na2SO4?

Back

The molar mass of Na2SO4 is 142.04 g/mol.

Front

If you have 6.02 x 10^23 particles of a substance, how many moles do you have?

Back

You have 1 mole of the substance.

Front

What is the molar mass of Iron (Fe)?

Back

The molar mass of Iron (Fe) is 55.93 g/mol.

Front

How do you calculate the number of moles from grams?

Back

To calculate the number of moles from grams, divide the mass of the substance (in grams) by its molar mass (in g/mol).

Front

What is the relationship between moles and volume for gases at STP?

Back

At standard temperature and pressure (STP), 1 mole of a gas occupies 22.4 liters.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, which is the number of particles in one mole of a substance.

Tags

NGSS.HS-PS1-7