Chemistry, 10.10.2019 05:00 anniejordan0412
The occupational safety and health administration has set the limit on the maximum percentage of carbon dioxide (co) 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 0.500 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 % o, by mass
Answers: 2
Chemistry, 22.06.2019 09:00
Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?
Answers: 1
Chemistry, 22.06.2019 10:00
3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?
Answers: 2
Chemistry, 22.06.2019 15:10
Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?
Answers: 1
Chemistry, 22.06.2019 22:30
Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.
Answers: 1
The occupational safety and health administration has set the limit on the maximum percentage of car...
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