Relationship between number of moles and the number of particles

Find the number of atoms in 0.5 mole of aluminium.

[Avogadro constant, N_A: 6.02x10²³mol^-1]

• 3.01x10²³

• 3.01x10²²

• 6.02x10²³

• 6.02x10²²

Find the number of molecules in 1.2 moles of hydrogen gas.

[Avogadro constant, N_A: 6.02x10²³mol^-1]

• 7.224x10²³

• 7.224x10²⁴

• 3.612x10²³

• 5.02x10²³

Find the number of oxide ions in 0.6 mole of oxide ions.

[Avogadro constant, N_A: 6.02x10²³mol^-1]

• 3.612x10²³

• 1.00x10²⁴

• 9.97x10^-25

• 9.97x10²¹

How many moles of water contain 3.01x10²² water molecules?

[Avogadro constant, N_A: 6.02x10²³mol^-1]

• 0.05 mol

• 0.25 mol

• 0.75 mol

• 0.35 mol

A beaker contains a sample of 0.5 mole of potassium bromide, KBr.

Find the number of formula units of KBr in the beaker.

[Avogadro constant, N_A: 6.02x10²³mol^-1]

• 3.01x10²³

• 1.204x10²⁴

• 8.31x10²¹

• 8.31x10^-25

A beaker contains a sample of 0.5 mole of potassium bromide, KBr.

Calculate the total number of ions present in the beaker.

[Avogadro constant, N_A: 6.02x10²³]

• 3.01x10²³

• 6.02x10²³

• 1.204x10²⁴

• 1.204x10²²