Unit 5: moles

Front

What is a mole?

Back

A mole is a unit of measurement in chemistry that represents 6.02 x 10^23 particles (atoms, molecules, ions, etc.).

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.

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 compound's formula.

Front

What is the molar mass of Phosphorus (P)?

Back

The molar mass of Phosphorus (P) is 31 g/mol.

Front

Calculate the molar mass of Ba(C2H3O2)2.

Back

The molar mass of Ba(C2H3O2)2 is 255.3 g/mol.

Front

How many moles are in 3.01 x 10^22 atoms of magnesium?

Back

There are 0.050 moles of magnesium in 3.01 x 10^22 atoms.

Front

What is the mass of 5 moles of Phosphorus (P)?

Back

The mass of 5 moles of Phosphorus (P) is 155 g.

Front

How many molecules are in 9.44 moles of AlCl3?

Back

There are 5.68 x 10^24 molecules in 9.44 moles of AlCl3.

Front

What is the formula to convert moles to molecules?

Back

To convert moles to molecules, multiply the number of moles by Avogadro's number (6.02 x 10^23).

Front

What is the relationship between moles and mass?

Back

The relationship is given by the formula: mass (g) = moles x molar mass (g/mol).