Question

500 mL of a 1 in 10,000 solution of adrenaline is required. How many millilitres of...

500 mL of a 1 in 10,000 solution of adrenaline is required. How many millilitres of a solution containing 0.7 mg/mL of adrenaline would be needed?

I was able to come up with 71.42 but it is not the actual answer. The correct answer is 71 ml Could you please tell me where I went wrong with my calculations?

solving for C1xV1= C2XV2

0.1 X 500ml= (ml) X 0.7

solving for V2 = 71.42

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