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Please help me understand by explaining!! (i) How much amount (in milligrams) of riboflavin ( MW=376.4g/mol ) will you need to prepare a 6.4104M stock

Please help me understand by explaining!! image text in transcribed
(i) How much amount (in milligrams) of riboflavin ( MW=376.4g/mol ) will you need to prepare a 6.4104M stock solution in 10ml volume? (ii) How much volume of the above stock solution you will need to prepare the riboflavin solutions of following concentrations: (a) 0.059mM in 25ml (b) 14M in 25ml

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