The mole concept

Question 1 of 10

How many moles are in 20 g of NaOH (Na = 23, O = 16, H = 1)?

Question 2 of 10

The mass of 3.01 × 10²³ molecules of NH₃ (N = 14, H = 1) is

Question 3 of 10

How many moles are in 4.4 g of carbon dioxide? (C = 12, O = 16)

Question 4 of 10

What volume at s.t.p. is occupied by 8.8 g of CO₂? (C = 12, O = 16)

Question 5 of 10

How many molecules are in 3.6 g of water? (H₂O = 18; L = 6.02 × 10²³)

Question 6 of 10

The number of moles of oxygen atoms in 0.5 mol of CuSO₄ is

Question 7 of 10

The molar mass of H₂SO₄ (H = 1, S = 32, O = 16) is

Question 8 of 10

How many molecules are in 0.5 mol of water? (Avogadro's constant = 6.02 × 10²³ mol⁻¹)

Question 9 of 10

The number of atoms in 0.5 mol of carbon is

Question 10 of 10

What is the mass of 0.25 mol of sodium hydroxide, NaOH? (Na = 23, O = 16, H = 1)