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What is the concentration in ppm, of a s...

What is the concentration in ppm, of a solution containing 50mg of Hg per litre?

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Parts per million (p pm) `=("Mass of solute")/("Mass of solution")xx10^(6)`
`=(50)/(10^6)xx10^(6)=50ppm`
(1L of water `=1 kg =10^(6) mg`).
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