Questions on Word Problems: Unit Conversion answered by real tutors!

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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?: 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(1120) About Me  (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).
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Reference:
http://www.joyofbaking.com/USMetricVolumeEquiv.html
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1 teaspoon = 4.9 ml
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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)