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chem help Gen chem 121?
The density of air at ordinary atmospheric pressure and 25 C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 13.5 X 19.5 X 7.0ft? Express your answer using two significant figures.
1 個解答
- plays_poorly...Lv 78 年前最愛解答
The density of air at ordinary atmospheric pressure and 25 C is 1.19 g/L. What is the mass, in kilograms, of the air in a room that measures 13.5 X 19.5 X 7.0 ft? Express your answer using two significant figures.
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13.5 ft x 19.5 ft x 7 ft = 1842.75 ft^3
12 in/ft x 2.54 cm/inch = 30.48 cm/ft
(30.48 cm/ft)^3 = 28,316 cm^3/ft^3
1842.75 ft^3 x 28316 cm^3/ft^3 x
1 liter/1000 cm^3 = 1842.75 x 28.316 =
52179 liters; 52179 liters x 1.19 grams/liter =
62093 grams x 1 kg/1000 grams = 62 kg.
