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 Ca 3 (PO 4 ) 2 is ————. (d) Formula of sodium carbonate is ——and that of ammonium sulphate is ————.

Question

Fill in the blanks (a) In a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is called &#x2014;&#x2014;&#x2014;&#x2014; (b) A group of atoms carrying a fixed charge on them is called &#x2014;&#x2014;&#x2014;&#x2014;. (c) The formula unit mass of Ca 3 (PO 4 ) 2 is &#x2014;&#x2014;&#x2014;&#x2014;. (d) Formula of sodium carbonate is &#x2014;&#x2014;and that of ammonium sulphate is &#x2014;&#x2014;&#x2014;&#x2014;.

Philoid · Accepted Answer

(a) In a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is called law of conservation of mass.

(b) A group of atoms carrying a fixed charge on them is called polyatomic ion.

(c) The formula unit mass of Ca₃ (PO₄)₂ is (3 × atomic mass of Ca) + (2 × atomic mass of phosphorus) + (8 × atomic mass of oxygen) = 310

(d) Formula of sodium carbonate is Na₂CO₃ and that of ammonium sulphate is (NH₄)₂SO_4.