Mole, Molar mass and Molar Volume

Front

What is the definition of 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 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 molar mass of a compound?

Back

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

Front

What is the molar volume of a gas at standard temperature and pressure (STP)?

Back

The molar volume of a gas at STP is 22.4 liters.

Front

What is the chemical formula for water?

Back

H2O

Front

What is the difference between ionic and covalent compounds?

Back

Ionic compounds are formed by the transfer of electrons between atoms, while covalent compounds are formed by the sharing of electrons.

Front

What is a formula unit?

Back

A formula unit is the lowest whole number ratio of ions in an ionic compound.

Front

How many moles are in 46.0 grams of sodium (Na)?

Back

1 mole of sodium is approximately 23 grams, so 46.0 grams of sodium is about 2 moles.

Front

What is the definition of a molecule?

Back

A molecule is two or more atoms held together by covalent bonds.

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.