Question

A molecule of water is made up of 2 atoms of hydrogen and 1 atom of oxygen. What percent of the atoms of a water molecule is oxygen?

Answer 1

1/3 = 33%

Answer 2

Numbers of atoms in molecule of water

1+2=3

1 atom of oxygen is:

(1/3)*100%=0.33333*100%=33.333%

Answer 3

Anonymous is right. It's 33.33%

Answer 4

Thank you both!!