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1) The concentration of carbon monoxide in an urban apartment is 48 µg/m3. what mass of carbon monoxide in grams is persent in room measuring 11.0 ft x 11.5 x 20.5 ft?

2) A copper refinery produces a copper ingot weighing 150 Ib. if the copper is drawn into wire whose diameter is 7.50 mm, how many feet of copper can be obtained from the ingot? the density of copper is 8.94 g/cm3. ( Assume that the wire is a cylinder whose volume V = pr2h, where r is its radius and h is its hight or length.)

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