LT 7.1 Mole and Molar Mass

Front

What is the definition of 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 the atoms in the chemical formula of the compound.

Front

What is the molar mass of sodium chloride (NaCl)?

Back

58.443 g/mol.

Front

What is the molar mass of carbon dioxide (CO2)?

Back

44 g/mol.

Front

What is the molar mass of aluminum (Al)?

Back

26.982 g/mol.

Front

What is the molar mass of sodium (Na)?

Back

22.990 g/mol.

Front

What is the molar mass of gold(III) chloride (AuCl3)?

Back

303.3 g/mol.

Front

What is the significance of the mole in chemistry?

Back

The mole is a unit that measures the amount of substance, allowing chemists to count particles by weighing them.

Front

How many atoms are in one mole of a substance?

Back

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

Front

What is the relationship between molar mass and the number of moles?

Back

The number of moles can be calculated by dividing the mass of the substance by its molar mass.