
Concept explainers
A concentration of 8.00 × 102 ppm by volume of CO is considered lethal to humans. Calculate the minimum mass of CO in grams that would become a lethal concentration in a closed room 17.6 m long, 8.80 m wide, and 2.64 m high. The temperature and pressure are 20.0°C and 756 mmHg, respectively.

Interpretation:
The minimum mass of carbon monoxide would become poisonous to humans in a closed room has to be calculated.
Concept Introduction:
Partial pressure:
The product of total pressure of gases and number of mole of individual gas is the partial pressure of a gas.
Mole fraction:
Mole fraction is the ratio number of moles of a species to that of total number of moles of solution.
Ideal gas equation:
The ideal gas equation is given as
Where,
P is the pressure
V is the volume
n is number of moles
R is the gas constant
T is the temperature
The volume of the closed room is calculated as,
Answer to Problem 20.65QP
The minimum mass of carbon monoxide would become poisonous to humans in a closed room is
Explanation of Solution
Given,
Temperature
Total pressure
Length of the closed room
Wide of the closed room
Height of the closed room
The volume of the closed room is calculated as,
The mole fraction of
From the total pressure and mole fraction of carbon monoxide, the partial pressure is calculated as,
The number of moles of carbon monoxide is calculated as,
The mass of carbon monoxide is calculated using molar mass of carbon monoxide as,
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