a preparation contains 900mg of sodium chloride dissolved in water to produce 100ml of solution.express the concentration of the solution as an amount strength.
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Explanation:
Express 900mg of sodium chloride, made up to 100mL with water, as a percentage. To express the value as a percentage, we need to convert the number of milligrams in 100mL to grams in 100mL: 900mg = 0.9g There is 0.9g of sodium chloride in 100mL of solution, thus the percentage is 0.9% w/v.
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