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Question 1 of 3
What is the concentration of Zinc Oxide in an ointment prepared by mixing 25ml of an ointment containing 2% (w/w) Zinc Oxide, 30ml of an ointment containing 10% Zinc Oxide and 20ml of an ointment containing 5% Zinc Oxide? Answer to 1 decimal place.
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Question 2 of 3
50ml of Phenobarbital Elixir, 80ml of Belladonna Tincture and 90ml of Aromatic Elixir are mixed together. Phenobarbital Elixir contains 15% Ethanol, Belladonna Tincture contains 65% Ethanol and Aromatic Elixir contains 22% Ethanol. What is the concentration of Ethanol in the resulting solution? Answer to 1 decimal place.
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Question 3 of 3
150ml of 50% (w/v) Glucose solution are mixed with 200ml of 65% Glucose solution and the resulting solution is made up to a volume of 500ml with water. What is the concentration of Glucose in the final solution? Answer to 1 decimal place.
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