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8 November, 22:32

A technician is asked to make up a solution of physiological saline and is told that it should be a 0.9% NaCl solution using the mass/volume percent measurement of concentration. If the technician is making 100 milliliters of solution, how much NaCl should be included?

A. 9 micrograms

B. 9 kilograms

C. 9 grams

D. 0.9 grams

E. 90 grams

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Answers (1)
  1. 8 November, 22:37
    0
    0.9 grams

    Explanation:

    Given that

    NaCl solution = 0.9%

    And, the milliliters of solution = 100

    So, the computation of the Nacl included is shown below:

    As We assume that

    The 1 gram : 100 gram = 1%

    So we assume the number of grams be X

    So, now the equation is

    X gram : 100 ml = 0.9%

    So, the X gram is

    = 0.9% * 100 ml

    = 0.9 grams

    Hence, the correct answer is D. 0.9 grams
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