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quick calculation question i need help with. (chemsitry i think) Watch

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    Hi im sorry i dont know if this is the correct forum to ask this question in but here it is:
    I need to calculate the riboflavin content for a solution. It was made from 1 vitamin tablet dissolved in 20ml of water. Then the solution was made up to 100ml with neutral buffer. Then a 1:50 dilution was made with the solution. The concentration of riboflavin in the 1:50 solution was 86 μg/L. I need to know the riboflavin content in the tablet, in mg. Could anyone be kind enough to help me with this please. Thank you.
 
 
 
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