Fill in the blanks
(a) In a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is called ___.
(b) A group of atoms carrying a fixed charge on them is called ___.
(c) The formula unit mass of Ca3(PO4)2 is ____.
(d) Formula of sodium carbonate is ___ and that of ammonium sulphate is ____.
(a) Law of conservation of mass
Law of conservation of mass states that mass can neither be created nor be destroyed, hence the mass of reactants = mass of products
(b) Polyatomic ion
(c) (3 x atomic mass of Ca) + (2 x atomic mass of phosphorus) + (8 x atomic mass of Oxygen)
(d) Na2CO3 and (NH4)2SO4