Question

# A concentration of 0.5 ppm by volume SO_{2} in the airis harmful to plant life. What is the percent by volume of thisconcentration?

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A concentration of 0.5 ppm by volume $$\displaystyle{S}{O}_{{{2}}}$$ in the airis harmful to plant life. What is the percent by volume of thisconcentration?

Concentration by volume of $$\displaystyle{S}{O}_{{{2}}}$$ inair is 0.5ppm which means
0.5ppm= 0.5mg $$\displaystyle{S}{O}_{{{2}}}$$ / 1.0 L air
percent by volume = volume of $$\displaystyle{S}{O}_{{{2}}}$$ / volume of air *100
to calculate the volume of $$\displaystyle{S}{O}_{{{2}}}$$ we need to havethe density since mass is given