What Is The Mass Percent Of Hydrogen, H, In Resveratrol? Select One: A. 5.31% B. 5.26% C. 19.02% D. 18.83%

What is the mass percent of Hydrogen, H, in resveratrol? Select one: a. 5.31% b. 5.26% c. 19.02% d. 18.83%

 

The answer is letter A. 5.31%

Look for the atomic masses of the element from the periodic table.

C = 12.01

H = 1.01

O = 16.00

Next, determine how many grams of each element are present in one mole of C14H12O3

C = 12.01 x 14 mol = 168.14 g

H = 1.01 x 12 mol = 12.12 g

O = 16.00 x 3 mol = 48 g

The mass of one mole of C14H12O3 is:

168.14 g + 12.12 g + 48 g = 228.26 g

To solve the mass percentage of the element use the equation:

mass % C = 168.14 g / 228.26 g x 100 = 73.66%

mass % H = 12.12 g / 228.26 g x 100 = 5.31%

mass % O = 48 g / 228.26 g x 100 = 21.03%

Therefore the mass percentage of the hydrogen in Resveratrol is 5.31%

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