100 mixture of mgco3 and caco3 is heated to convert carbonates to metal oxides. after the reaction 64.35g of metal oxide was left. What is the mass of Mgco3 in the original sample

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous

Describe the properties of sodium, chlorine, and sodium chloride

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-.