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Question 1 of 6

A balance is accurate to 100 milligrams. If a pharmacist weighs out 2.7 grams of a substance, what is the maximum percentage error of this measurement? Answer to 1 decimal place.
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%
The maximum percentage error is 3.7%

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Question 2 of 6

A student needs to weigh out 360 milligrams of Morphine Sulphate. The balance available has a sensitivity of 12 milligrams. If the measurement is to be accurate to 5 %, can the student weigh 360 milligrams on this balance? Answer Y for Yes , N for No.

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Y/N
The student can weigh out 360 mg on the balance available.

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Question 3 of 6

A pharmacist weighed out 300 milligrams of Codeine Sulphate on a dispensing balance. Later, the pharmacist discovered that the balance had not been placed in equilibrium before the measurement was made and as a result, a 20 % error had been incurred. If the Codeine Sulphate was weighed on the heavy balance pan, how many milligrams of Codeine Sulphate were actually weighed?
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milligrams
240 milligrams of Codeine Sulphate were actually weighed.

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Question 4 of 6

A 1000-millilitre cylindrical dispensing measure is calibrated in units of 10 millilitres. A pharmacist measures 900 ml of water in the measure. What is the maximum percentage error in this measurement? Answer to 1 decimal place.
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%
The maximum error is 1.1%.

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Question 5 of 6

A student has 2 balances available for weighing out 325 milligrams of Ascorbic Acid. Balance A has a sensitivity of 10 milligrams; balance B has a sensitivity of 20 milligrams. If the measurement MUST be accurate to at least 4 %, which of the balances can the student use? Answer A for balance A only; B for balance B only; C for the student can use both balances; D for the student should NOT use either balance.
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A / B / C / D
The student should only use balance A.

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Question 6 of 6

A pharmacist weighed out 480 milligrams of Morphine Sulphate only to discover later on that the balance had not been in equilibrium and an error of 15 % had been incurred. The Morphine Sulphate was weighed on the light balance pan. What was the actual amount of Morphine Sulphate weighed?
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milligrams
The actual amount of Morphine Sulphate weighed was 552 milligrams.

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