Question

4. The valency of magnesium is 2. Give the
valency of the other ion in the following
compounds
i. Mgo
ii. Mg3N2
iii. MgCl
iv. MgCO3
v. Mg(NO3)
vi.Mg(OH)2


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Answer 1

Explanation:

Perimter=sum of all lengths of sides of triangle

⇒ Perimeter =3a {a= side of triangle }

⇒45=3a

⇒a=15cm.