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Question 1 of 3
75 g of Coal Tar Paste contains 4.5 g of Zinc Oxide. What percentage (by mass) of the paste is Zinc Oxide?
%
Total Amount
Percentage of Zinc Oxide in paste = 4.5 x 100 %
75
Percentage of Zinc Oxide in paste = 6 %
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Question 2 of 3
The source formula for Compound Benzoic Acid Ointment BP 1988 is:
Benzoic Acid 60 g
Salicylic Acid 30 g
Emulsifying Ointment 910 g
Total Amount
Percentage of Benzoic Acid in ointment = 60 x 100 %
1000
Percentage of Benzoic Acid in ointment = 6 %
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Question 3 of 3
15 ml of eye drops contain 1.95 ml of Distilled Witch Hazel. What percentage (by volume) of the solution is Distilled Witch Hazel?
Total Amount
Percentage of Witch Hazel in the solution= 1.95 x 100 %
15
Percentage of Witch Hazel in the solution = 13 %
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