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Chapter 7.2, Problem 65E
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### Elementary Technical Mathematics

12th Edition
Dale Ewen
ISBN: 9781337630580

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Section
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### Elementary Technical Mathematics

12th Edition
Dale Ewen
ISBN: 9781337630580
Textbook Problem

# A label reads: “2.5 mL of solution for injection contains 1000 mg of streptomycin sulfate.” How many millilitres are needed to give 800 mg of streptomycin?

To determine

To calculate: The amount of solution needed to give 800 mg of streptomycin, if 2.5 ml of solution for injection contains 1000 mg of streptomycin sulfate.

Explanation

Given Information:

There is total 2.5 ml of solution for injection contains 1000 mg of streptomycin sulfate, also the amount of streptomycin that is needed to give is 800 mg.

Formula used:

The proportion is represented as:

ab=cd

The above proportion is also equivalent to:

ad=bc

Calculation:

Consider the amount of solution is x.

The ratios of amount of streptomycin to the volume of solution is,

x800Â mg=2.5â€‹Â ml1000Â mg

Use the equivalent expression of the proportional expression,

(1000Â mg)x=2

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