Urgent a substance has 55.80% carbon, 7.04% hydrogen, and 37.16% oxygen. what is it's empirical and molecular formula if it has a molar mass of 301.35 grams?

May someone me with these science questions

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.

Which of the following is not true about the atomic model of substances?