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caffeine (c8h10n4o2) is the world's most consumed psychoactive drug. it's common name is 1,3,7-trimethylxanthine. it is completely absorbed within 30 to 45 minutes and it effects diminish within about three hours. what is the molarity of a solution that contains 14.1 g of caffeine dissolved in 942 ml of solution? enter to 4 decimal places.



Answer :

The molarity of a solution that contains 14.1 g of caffeine dissolved in 942 ml of solution is 0.0770 mol/l.

The formula for molarity is,

M = n / V

where, M = molarity of solution

V = volume of solution in litres

where, n = given mass / molar mass

n = 14.1 /194.19

n = 0.0726

So, molarity is

M = 0.0726 / 0.942

M = 0.0770 mol/l

Therefore, molarity of a solution that contains 14.1 g of caffeine dissolved in 942 ml of solution is 0.0770 mol/l.

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