Moles

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical 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

How many particles are in one mole?

Back

One mole contains approximately 6.022 x 10^23 particles, known as Avogadro's number.

Front

What is the formula to calculate the number of moles?

Back

Number of moles = Mass (g) / Molar mass (g/mol).

Front

How do you convert particles to moles?

Back

To convert particles to moles, divide the number of particles by Avogadro's number (6.022 x 10^23).

Front

What is molar mass?

Back

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

Front

How do you calculate the mass of a substance from moles?

Back

Mass (g) = Number of moles x 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 do you find the number of moles in a given mass of a substance?

Back

To find the number of moles, divide the mass of the substance by its molar mass.

Front

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

Back

At standard temperature and pressure (STP), one mole of an ideal gas occupies 22.4 liters.

Front

How do you calculate the number of molecules in a given number of moles?

Back

Number of molecules = Number of moles x Avogadro's number (6.022 x 10^23).