In preparing a certain ointment, a pharmacist used 28.35 g of zinc oxide instead of the 31.1 g called for. calculate the percentage of error on the basis of the desired quantity.

9.70%

Step-by-step explanation:

The formula to find the percentage error is given by :-

Given : Actual mass of zinc oxide used by pharmacist = 28.35 g

Estimated mass of zinc oxide used by pharmacist =31.1 g

Now,

i.e.

i.e.

Hence, the  percentage of error on the basis of the desired quantity.= 9.70%

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step-by-step explanation:

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