Q17 of 24 Page 97

Write the chemical formula using criss-cross method:

(a) Ammonium sulphate


(b) Magnesium bicarbonate


(c) Barium nitrate


a) Ammonium sulphate:


By applying criss-cross method:



Chemical formula: (NH4)2SO4


b) Magnesium bicarbonate:


By applying criss-cross method:



Chemical formula: Mg(HCO3)2


c) Barium nitrate:


By applying criss-cross method:



Chemical formula: Ba(NO3)2


More from this chapter

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15

Calculate the mass of 6.022 × 1023 N2 molecules.

 16

Give postulates of Dalton’s atomic theory.

 18

(a) Define the term ‘molecular mass’.

(b) Determine the molecular mass of ZnSO4.


[Atomic mass of Zn = 65 u, S = 32 u, O = 16 u]


 19

With the help of example, explain the law of conservation of mass.