What volume of 70,000ppm of CO2 does this represent in a room of 50dm^3 of air?

1 Answer
Ernest Z.
May 29, 2018

It represents #"3.5 dm"^3 color(white)(l)"CO"_2#.

Explanation:

A ppm is 1 "part" of something in #10^6# of those things.

For example, 70 000 ppm of #"CO"_2# means that there are #"70 000 dm"^3color(white)(l) "CO"_2# in #10^6color(white)(l)"dm"^3# of air.

#50 color(red)(cancel(color(black)("dm"^3color(white)(l) "air"))) × ("70 000 dm"^3color(white)(l) "CO"_2)/(10^6 color(red)(cancel(color(black)("dm"^3color(white)(l)"air")))) = 3.5color(white)(l) "dm"^3color(white)(l)"CO"_2#

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