Question

Conversion factors:

1000 mL per L
1000 ug per mg
A certain atmospheric sample contains 1.01 x 10-4 mg of some contaminant per mL of air. This passes through an airlock, into some Mars colony lander with a volume of 2.28 x 104 L. 401 people are living and working inside. Assuming equal exposure among every person how many micrograms of contaminant will each person receive?

Answer 1

The number of micrograms of contaminant each person will receive is 5,742.64 ug.

Number of micrograms of contaminant  per person

The number of micrograms of contaminant each person will receive is calculated as follows;

Amount of contaminant (mg) = (1.01 x 10⁻⁴ mg/mL) x 2.28 x 10⁴ L

Amount of contaminant (mg) = 2.3028 mg.L/mL

Amount of contaminant (mg) = (2.3028 mg.L/mL) x (1000 mL/L) = 2,302.8 mg

Amount of contaminant (ug) = 2,302.8 mg x 1000 ug/mg = 2,302,800 ug

Amount of contaminant per person (ug/person)

=  (2,302,800 ug) / (401 persons)

= 5,742.64 ug per person

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