What is the equation for the percentage mass of an element in a compound?

1 year ago


1 Reply




Stacey Christiansen

1 Reply

Carola Profile Picture
Carola Best Answer!

Verified Sherpa Tutor

% mass = (mass of the desired element/ relative formula mass of the compound) x 100

Make sure you consider the subscript numbers in the chemical formula. Check out for worked examples.

Experienced GCSE Science and A level Chemistry tutor with Phd

Interested in booking a 1-1 lesson with me?

Click here to view my profile and send me a message.

Got the answer? Help Stacey out.