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A 500 g toothpaste sample has 0.2 g fluo...

A 500 g toothpaste sample has `0.2` g fluoride concentration. What is the concentration of `F^(Theta)` in ppm ?

A

`4xx10^(3)`

B

`4xx10^(@)`

C

`4xx10`

D

`2xx10^(2)`

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