Answer to Question #142035 in General Chemistry for Dina Jawad

Question

Calculate the percentage by mass of oxygen in C2H5OH

Answer 1

Solution:

Calculate the percent by mass of each element by dividing the mass of that element in 1 mole of the compound by the molar mass of the compound and multiplying by 100%.

Molar mass of C₂H₅OH = 46,07 g/mol

Mass of O in 1mol C₂H₅OH = 16.00g

% O = 16.00/46.07×100% = 34.73 %

Answer: % O = 34.73 %