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Question
One tonne of air contains 2 × 10−3 g of carbon as smoke. Calculate the concentration of carbon in ppm in air.
Numerical
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Solution
Given: Mass of carbon = 2 × 10−3 g
Mass of air = 1 tonne = 1000 kg = 1,000,000 g
ppm = `"Mass of solute"/"Mass of solution" xx 10^6`
= `(2 xx 10^-3)/1000000 xx 10^6`
= 2 × 10−3
∴ The concentration of carbon in ppm in air is 2 × 10−3.
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