Which pair of samples contains the same number of oxygen atoms in each compound? a. 0.10 mol H2SO4 and 0.20 mol H2SO3
b. 0.50 mol NaClO and 0.50 mol KCIO2
c. 0.10 mol SO2 and 0.20 mol Mgo
d. 0.20 mol Na3PO4 and 0.20 mol NaHCO3

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.