Higher Only
How many moles are present in 9 kg of glucose, C6H12O6?
Relative formula mass (Mr): C6H12O6 = 180
☐ | A | 0.02 mol | |
☐ | B | 0.05 mol | |
☐ | C | 20 mol | |
☐ | D | 50 mol |
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How many moles are present in 9 kg of glucose, C6H12O6?
Relative formula mass (Mr): C6H12O6 = 180
☐ | A | 0.02 mol | |
☐ | B | 0.05 mol | |
☐ | C | 20 mol | |
☐ | D | 50 mol |
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What is the mass of 0.25 moles of hydrated copper(II) sulfate, CuSO4.5H2O?
Relative formula mass (Mr): H2O = 18 CuSO4 = 160
☐ | A | 40.0 g | |
☐ | B | 44.5 g | |
☐ | C | 62.5 g | |
☐ | D | 1000 g |
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Nitrogen and hydrogen react together to make ammonia.
N2 + 3H2 → 2NH3
If 2.0 g of hydrogen is added to 12.0 g of nitrogen which substance is the limiting reactant and how much of the excess reactant remains?
Relative atomic masses (Ar): H = 1 N = 14
Limiting Reactant | Mass of excess reactant | |||
☐ | A | nitrogen | 2.0 g | |
☐ | B | nitrogen | 10.0 g | |
☐ | C | hydrogen | 2.7 g | |
☐ | D | hydrogen | 9.3 g |
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A solution of CuSO4 has a concentration of 35 g dm-3.
What mass of CuSO4 would there be in 250 cm3 of the solution?
☐ | A | 140 g | |
☐ | B | 8.75 g | |
☐ | C | 7.14 g | |
☐ | D | 1.40 g |
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What is the relative formula mass of butene, C4H8 ?
(relative atomic masses: H=1, C=12)
☐ | A | 12 | |
☐ | B | 13 | |
☐ | C | 56 | |
☐ | D | 100 |
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