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itryphysics
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Homework Statement
A house has a volume of 840 m^3.
What is the total mass of air inside the house at 20 degrees celcius? Assume that the pressure is 1.00 atm.
Homework Equations
Charles law Volume is directly proportional to Temperature
1 mol of gas at 0 degrees celcius has V = 22.4L
The Attempt at a Solution
using charles law i determined that the new volume at 20 degrees celcius would be = (20*22.4 L ) or (22.4 *10^-3 m^3)*(2) = .448 m^3
number of moles = 840 m^3 / .448 m^3 = 1875 mol
1 mol of air has a mass of about 29 g = .029 kg
so m= (1875 mol) (.029kg/mol) = 54.37 kg
my method apparenlt is faulty because the answer is rejected
Please help me solve this