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Compounds

Question 44Fi...

Question

Question 44
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 $C a_{3} (P O_{4})_{2}$ is __.

(d) Formula of sodium carbonate is _ and that of ammonium sulphate is ____.

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Solution

(a) Law of conservation of mass

(b) Polyatomic ion

(c) (3 x atomic mass of Ca) + (2 x atomic mass of phosphorus) + (8 x atomic mass of Oxygen) = 310

(d) $N a_{2} C O_{3} a n d (N H_{4})_{2} S O_{4}$

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