Moles and reacting masses

Question 1

What is the mass of 2 mol of carbon dioxide (CO₂, Mr = 44), in g?

Answer g

Question 2

How many moles are in 8 g of magnesium oxide (MgO, Mr = 40)?

Answer mol

Question 3

2Mg + O₂ → 2MgO. What mass of magnesium oxide forms from 24 g of magnesium? (Ar: Mg = 24, O = 16)

Answer g

Question 4

What is the mass of 0.1 mol of sodium chloride (NaCl, Mr = 58.5), in g?

Answer g

Question 5

How many moles are in 11.7 g of sodium chloride (NaCl, Mr = 58.5)?

Answer mol

Question 6

CaCO₃ → CaO + CO₂. What mass of carbon dioxide is released when 200 g of calcium carbonate decomposes? (Mr: CaCO₃ = 100, CO₂ = 44)

Answer g

Question 7

What is the mass of 0.5 mol of oxygen (O₂, Mr = 32), in g?

Answer g

Question 8

How many moles are in 4 g of magnesium oxide (MgO, Mr = 40)?

Answer mol

Question 9

2Mg + O₂ → 2MgO. What mass of magnesium oxide forms from 24 g of magnesium? (Ar: Mg = 24, O = 16)

Answer g

Question 10

What is the mass of 4 mol of sodium chloride (NaCl, Mr = 58.5), in g?

Answer g

Question 11

How many moles are in 200 g of calcium carbonate (CaCO₃, Mr = 100)?

Answer mol

Question 12

2Mg + O₂ → 2MgO. What mass of magnesium oxide forms from 6 g of magnesium? (Ar: Mg = 24, O = 16)

Answer g

Question 13

What is the mass of 1.5 mol of methane (CH₄, Mr = 16), in g?

Answer g

Question 14

How many moles are in 300 g of calcium carbonate (CaCO₃, Mr = 100)?

Answer mol

Question 15

CaCO₃ → CaO + CO₂. What mass of carbon dioxide is released when 100 g of calcium carbonate decomposes? (Mr: CaCO₃ = 100, CO₂ = 44)

Answer g

Question 16

What is the mass of 2 mol of carbon dioxide (CO₂, Mr = 44), in g?

Answer g