Question

Determine the empirical formula of H 3.66%; P 37.8%; O 58.5%

Answer 1

We have atomic masses of: (omit units)
O=16
H=1
P=39
So:
O=58,5/16=3,65/1,21=3,01≈3
H=3,66/1=3,66/1.21=3,02≈3
P=37,8/31=1,21/1,21=1
So the empiric formula is:
H₃PO₃