We did not find results for: c=49.98%, h=5.19%, n=28.85%, o=16.48% the molar mass of caffeine is 194.19 g/mol. find the molecular formula of caffeine

First establish that your going to measure using 1 mole

So now you have 194.19g caffeine

Carbon is 49.48% of the mass

so you have (49.48%) * (194.19) = 96.0852 g carbon

to see how many carbons you have you do (mass/Molar mass)

(96.0852/12.0107) = 10

So you have 10 carbons

Do it for each one:

Hydrogen:

(5.19%) * (194.19) = 10.0785 g

(mass/molar mass) (10.0785/1.00794) = 10

Nitrogen:

(28.85%) (194.19) = 56.0238 g

(56.0238/14.00674) = 4

Oxygen:

(16.48%) (194.19) = 32.0025g

(32.0025/15.9994) = 2

Final formula: C8 H10 N4 O2