Calculate moles of oxygen atoms in 0.68mol of kmno4

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

thats how its supposed to be

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

the answer is c. nacl