Vanillin is the compound containing carbon, hydrogen, and oxygen that gives vanilla beans their distinctive flavor....

Vanillin is the compound containing carbon, hydrogen, and oxygen that gives vanilla beans their distinctive flavor. The combustion of 30.4 mg of vanillin produces 70.4 mg of CO2 and 14.4 mg of H2O. The mass spectrum of vanillin shows a molecular-ion line at 152 AMU. Use this information to determine the molecular formula of vanillin. PLEASE show every step of your work. I desperately need help.

Expert Solution

Mass of Carbon obtained from 30.4 mg Vanillin = (70.4/44 )x12 = 19.2 Mg

Mass of hydrogen obtained from 30.4 mg Vanillin = (14.4/18)x2 = 1.6 mg

Mass of oxygen obtained from 30.4 mg Vanillin = 30.4 -19.2 -0.8 = 9.6 mg

C H O

mass 19.2 1.6 9.6

Divide by atomic mass 19.2/12 1.6/1 9.6/16

=1.6 =1.6 =0.6

divide each by smallest 1.6/0.60 1.6/0.60 0.60/0.60

~ 8/3 ~ 8/3 1

convert to simplest whole number ratios

8 8 3

The empirical formula = C₈H₈O₃

queen_honey_blossom answered 2 years ago

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