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What is the mass in grams of 6.12 x 10^20 molecules of caffeine, C8H10N4O2?
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What is the mass in grams of 6.12 x 10^20 molecules of caffeine, C8H10N4O2?

User Haojie
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6,02*10^(23) \ \ \ \ \ \ \rightarrow \ \ \ \ \ 194,2g\\ 6,12 * 10^(20) \ \ \ \ \ \ \rightarrow \ \ \ \ \ x\\\\ x=(6,12*10^(20)*194,2g)/(6,02*10^(23))\approx197*10^(-3)g=0,197g
User Shawn Miller
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