13. A 10-mL graduate weighs 42.745 g. When 5 mL of distilled water is measured in it, the combined weight of the graduate and water is 47.675 g. By definition, 5 mL of water should weigh 5 g. Calculate the weight of the measured water and express any deviation from 5 g as a percentage of error.
13. A 10-mL graduate weighs 42.745 g. When 5 mL of distilled water is measured in it, the combined weight of the graduate and water is 47.675 g. By definition, 5 mL of water should weigh 5 g. Calculate the weight of the measured water and express any deviation from 5 g as a percentage of error.
14. A graduate weighs 35.825 g. When 10 mL of water is measured in it, the weight of the graduate and water is 45.835 g. Calculate the weight of water, and express any deviation from 10 g as a percentage of error.
15. A pharmacist attempts to weigh 0.375 g of morphine sulfate on a balance of dubious accuracy. When checked on a highly accurate balance, the weight is found to be 0.400 g. Calculate the percentage of error in the first weighing.
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