How many moles are present in 9 kg of glucose, C6H12O6?
Relative formula mass (Mr): C6H12O6 = 180
0.02 mol
0.05 mol
20 mol
50 mol
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How many moles are present in 9 kg of glucose, C6H12O6?
Relative formula mass (Mr): C6H12O6 = 180
0.02 mol
0.05 mol
20 mol
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
40.0 g
44.5 g
62.5 g
1000 g
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2.7 g aluminium reacts with 38.1 g of iodine, I2, to make 40.8 g aluminium iodide, AlI3.
Relative atomic masses (Ar): Al = 27 I = 127
Relative formula mass (Mr): AlI3 = 408
What coefficients would balance the equation for the reaction?
1 : 3 : 2
2 : 1 : 2
2 : 3 : 2
3 : 2 : 3
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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/dm3.
What mass of CuSO4 would there be in 250 cm3 of the solution?
140 g
8.75 g
7.14 g
1.40 g
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