Answer to Question #341880 in General Chemistry for Sky huseni

Question

What is the amount (in milligrams) of caffeine in a 50.0 mL 0.00793 M espresso coffee? (Caffeine is C,H,,N,O, with a molar mass of 194.2 g/mol) ...

Answer 1

n(caffeine) = C•V = 0.00793 M • 0.050 L = 0.1586 moles

m(caffeine) = n•Mr = 0.1586 mol • 194.2 g/mol = 30.8 g = 30800 mg