Question

Write the step by step method for writing the formulae for the below given chemical compounds

1. Copper chloride
2. Lead oxide
3. Mercuric sulphide

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Answer 1

Answer:

Q 1 ) Rules for writing a chemical formula

Below the symbol of each element, we write down its valency. Finally, we cross-over the valencies of the combining atoms. That is, with first atom we write the valency of second atom (as a subscript); and with the second atom we write the valency of first atom (as subscript).

How do you write copper chloride?

Copper(II) chloride is the chemical compound with the chemical formula CuCl2. This is a light brown solid, which slowly absorbs moisture to form a blue-green dihydrate.

Q 2)

PbO

Image result for what is the chemical compound for Lead oxide

lead compounds are the oxides: lead monoxide, PbO, in which lead is in the +2 state; lead dioxide, PbO2, in which lead is in the +4 state; and trilead tetroxide, Pb3O4. Lead monoxide exists in two modifications, litharge and massicot.

Q 3)

HgS

Image result for what is the chemical compound for Mercuric sulphide

Mercury(II) sulfide, HgS, is a black or red crystalline solid used chiefly as a pigment in paints, rubber, and plastics.

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Answer 2

I also don't know mercuric sulphide

but hope this helps you