A sample of a compound was found that has 40.25g of (C) Carbon and 59.75g of (O) Oxygen. What is the empirical formula for this sample.

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

Can someone me out on this question for my national 5 chemistry homework

Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.