Answer to Question #151676 in General Chemistry for Rome

Question

What is the percentage by mass of H in CH2O with a molar mass of 30.03 g/mol?

Answer 1

solutions:

molar mass of the compound = 30.03 g/mol.

mass of hydrogen = 2 g/molar

percentage by mass = (mass of the chemical/total mass of compound) x 100%.

percentage by mass of hydrogen = (2 / 30.03) × 100%

percentage by mass of Hydrogen = 0.06666 × 100%

percentage by mass of Hydrogen = 6.66%