Moles and reacting masses
11th grade (Year 12 in England) · 16 questions · Common Core: NGSS.HS-PS1-7 · England: KS4 Combined Science: Chemical changes (quantitative chemistry, Higher)
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Question 1
2Mg + O₂ → 2MgO. What mass of magnesium oxide forms from 6 g of magnesium? (Ar: Mg = 24, O = 16)
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Question 2
What is the mass of 1.5 mol of oxygen (O₂, Mr = 32), in g?
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Question 3
How many moles are in 4 g of sodium hydroxide (NaOH, Mr = 40)?
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Question 4
2Mg + O₂ → 2MgO. What mass of magnesium oxide forms from 6 g of magnesium? (Ar: Mg = 24, O = 16)
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Question 5
What is the mass of 2 mol of oxygen (O₂, Mr = 32), in g?
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Question 6
How many moles are in 64 g of oxygen (O₂, Mr = 32)?
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Question 7
2Mg + O₂ → 2MgO. What mass of magnesium oxide forms from 48 g of magnesium? (Ar: Mg = 24, O = 16)
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Question 8
What is the mass of 1.5 mol of sodium chloride (NaCl, Mr = 58.5), in g?
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Question 9
How many moles are in 3.2 g of methane (CH₄, Mr = 16)?
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Question 10
CaCO₃ → CaO + CO₂. What mass of carbon dioxide is released when 10 g of calcium carbonate decomposes? (Mr: CaCO₃ = 100, CO₂ = 44)
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Question 11
What is the mass of 0.5 mol of calcium carbonate (CaCO₃, Mr = 100), in g?
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Question 12
How many moles are in 5.85 g of sodium chloride (NaCl, Mr = 58.5)?
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Question 13
CaCO₃ → CaO + CO₂. What mass of carbon dioxide is released when 25 g of calcium carbonate decomposes? (Mr: CaCO₃ = 100, CO₂ = 44)
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Question 14
What is the mass of 1.5 mol of methane (CH₄, Mr = 16), in g?
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Question 15
How many moles are in 10 g of magnesium oxide (MgO, Mr = 40)?
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Question 16
2Mg + O₂ → 2MgO. What mass of magnesium oxide forms from 12 g of magnesium? (Ar: Mg = 24, O = 16)
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