# SOLUTION: Question #2: A preparation for cough contains 1.5 grams of an expectorant per 100 mL. How many grain of the expectorant are there in a teaspoonful?

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 Question 149187: Question #2: A preparation for cough contains 1.5 grams of an expectorant per 100 mL. How many grain of the expectorant are there in a teaspoonful?Answer by nerdybill(6948)   (Show Source): You can put this solution on YOUR website!The key to this problem is to determine the volume of a single teaspoon (in metric units). . Reference: http://www.joyofbaking.com/USMetricVolumeEquiv.html . 1 teaspoon = 4.9 ml . Your proportion is then: Let x = grams of expectorant in a teaspoon 1.5/100 = x/4.9 x = (1.5*4.9)/100 x = 7.35/100 x = .735 grams (or 735 milligrams)