Question

Ethanol, CzH5OH, is an organic chemical compound used in medical wipes and most commonly in antibacterial

hand sanitizer gels. Calculate the mass percent of hydrogen in this compound.

Answer 1

13.04 %

Step-by-step explanation:

First, find the Molecular mass of the individual elements present in the compound.

Carbon = 12

Hydrogen = 1

Oxygen = 16

Then, find the total mass of C₂H₅OH

(12 × 2) + (1 × 5) + 16 + 1 = 46

In order to find the percentage mass of hydrogen, you must take the Molecular mass of hydrogen in the compound, divide it by the Molecular mass of the compound and times that by 100.

% by mass of hydrogen =
`(1*6)/(46)` × 100

[it is 1 × 6 because 1 is the mass of hydrogen and there are 6 hydrogen atoms in C₂H₅OH]

% by mass of hydrogen = 13.04 %

Answer 2

13.1275%

Step-by-step explanation:

Molecular formula of ethanol is C2H5OH

Molar mass of ethanol is 46.0684g/mol

Carbon: 24.02g/mol

Hydrogen: 6.05g/mol

Oxygen: 15.99g/mol

Mass percent of hydrogen = 6/46×100 = 13.1275%

Hope this helps, have a great day!