The Occupational Safety and Health Administration has set the limit on the maximum percentage of carbon dioxide (CO2) in air a worker can breathe at 0.500% by mole. If dry ice (solid CO2) is sublimating (becoming a gas) in a room at a rate of 0.670 mol/min, what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change. Number mol air/ min What is the percent by mass of oxygen in a gaseous mixture whose molar composition is 0.500% CO2 and 99.500% air? The composition of air is 21% mole O2, 79% mole N2, and has an average molar mass of 29.0 g/mol. Number % 0, by mass 2 Tools x 10?

Question
The Occupational Safety and Health Administration has set the limit on the maximum percentage of
carbon dioxide (CO2) in air a worker can breathe at 0.500% by mole. If dry ice (solid CO2) is sublimating
(becoming a gas) in a room at a rate of 0.670 mol/min, what is the minimum rate that fresh air has to be
supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole?
Assume the room is well mixed, and the volume of the solid dry ice does not change.
Number
mol air/ min
What is the percent by mass of oxygen in a gaseous mixture whose molar composition is 0.500% CO2 and
99.500% air? The composition of air is 21% mole O2, 79% mole N2, and has an average molar mass of 29.0
g/mol.
Number
% 0, by mass
2
Tools
x 10?
Expand
Transcribed Image Text

The Occupational Safety and Health Administration has set the limit on the maximum percentage of carbon dioxide (CO2) in air a worker can breathe at 0.500% by mole. If dry ice (solid CO2) is sublimating (becoming a gas) in a room at a rate of 0.670 mol/min, what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change. Number mol air/ min What is the percent by mass of oxygen in a gaseous mixture whose molar composition is 0.500% CO2 and 99.500% air? The composition of air is 21% mole O2, 79% mole N2, and has an average molar mass of 29.0 g/mol. Number % 0, by mass 2 Tools x 10?

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