Lesson 4.3.1.2
4.3.1.2 Relative formula mass Quiz: AQA Chemistry, Unit 3
20 questions
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Lesson 4.3.1.2, Relative formula mass: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 3: Quantitative chemistry, written with Revision Ninja.
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The 20 questions
-
What is the relative formula mass of CO2? (C = 12, O = 16)
- 16
- 28
- 44
- 12
-
What is the relative formula mass of H2O? (H = 1, O = 16)
- 20
- 16
- 18
- 34
-
What is the relative formula mass of NaCl? (Na = 23, Cl = 35.5)
- 35.5
- 58.5
- 47
- 23
-
What is the relative formula mass of MgO? (Mg = 24, O = 16)
- 48
- 40
- 24
- 16
-
What is the relative formula mass of CaCO3? (Ca = 40, C = 12, O = 16)
- 60
- 88
- 72
- 100
-
What is the percentage by mass of oxygen in CO2? (C = 12, O = 16)
- 50%
- 27.3%
- 72.7%
- 36.4%
-
What is the percentage by mass of hydrogen in H2O? (H = 1, O = 16)
- 16.7%
- 88.9%
- 5.6%
- 11.1%
-
What is the percentage by mass of sodium in NaCl? (Na = 23, Cl = 35.5)
- 23.0%
- 35.5%
- 39.3%
- 60.7%
-
How do total relative formula masses of reactants and products compare in a balanced equation?
- Reactants are larger
- They are equal
- They are halved
- Products are larger
-
What is the relative formula mass of Mg(OH)2? (Mg = 24, O = 16, H = 1)
- 58
- 26
- 41
- 42
-
What is the relative formula mass of Ca(OH)2? (Ca = 40, O = 16, H = 1)
- 42
- 52
- 74
- 57
-
In 2H2 + O2 -> 2H2O, what is the total relative formula mass of reactants in the quantities shown?
- 34
- 40
- 36
- 18
-
What is the percentage by mass of carbon in CH4? (C = 12, H = 1)
- 25%
- 12%
- 50%
- 75%
-
Which compound has the higher percentage by mass of oxygen: CO2 or CO?
- CO
- CO2
- They are equal
- Neither contains oxygen
-
What is the percentage by mass of carbon in CaCO3? (Ca = 40, C = 12, O = 16)
- 6%
- 40%
- 12%
- 24%
-
What is the relative formula mass of Na2CO3? (Na = 23, C = 12, O = 16)
- 86
- 106
- 94
- 116
-
What units are used for relative formula mass?
- No units
- moles
- grams
- grams per mole
-
What is the relative formula mass of Cu(NO3)2? (Cu = 64, N = 14, O = 16)
- 126
- 250
- 162
- 188
-
A compound has relative formula mass 60 and is 40% carbon by mass. What mass of carbon is in 60 g of the compound?
- 40 g
- 12 g
- 24 g
- 20 g
-
Which element has the largest percentage by mass in H2SO4?
- Sulfur
- All equal
- Oxygen
- Hydrogen
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