46. Concentration can be measured in:
1. m
mol
2. mm
3. nmol.l-1.min-1
4. mmol.l-1
5. cm-3
47. The relative molecular mass of lactic acid is 90. Therefore the amount of lactic acid in 10 ml of a solution containing 0.9 g of lactic acid per litre is:
1. 10
mmol
2. 0.1 mmol
3. 1 mmol
4. 10 mmol
5. 0.1 mol
48. The relative molecular mass of ethanal is 45. Therefore the amount of ethanal in 100 ml of a solution containing 0.9 g of ethanal per litre is:
1. 2 mmol
2. 0.5 mmol
3. 2 mmol
4. 5 mmol
5. 2 mol
49. The relative molecular mass of ethanoic acid (acetic acid) is 60. Therefore the amount of ethanoic acid in 10 ml of a solution containing 6 g of ethanoic acid per litre is:
1. none of the below
2. 0.1mmol
3. 1 mmol
4. 10 mmol
5. 100 mmol
50. The relative molecular mass of glucose is 180. Therefore the amount of glucose in 1 ml of a solution containing 1.8 g of glucose per litre is:
1. 0.1mmol
2. 1 mmol
3. 10 mmol
4. 100 mmol
5. none of the above
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