Question

E. WRITE THE CHEMICAL FORMULAE USING CRISS-CROSS METHOD:

i) Aluminium Oxide ii) Ammonium Phosphate iii) Arsenic Sulphide iv) Ammonium Carbonate

v) Nickel Oxide​

Answer 1

Answer:

i) Al₂O₃

ii) (NH4+1)x(PO4-3)y

iii) As2S3

iv) NH4Cl

v) NiO

Explanation:

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Answer 2

Answer:

Chemical formula of the following is as follows:

(a) Magnesium chloride = MgCl

2

(b) Calcium oxide = CaO

(c) Copper nitrate = Cu(NO

3

)

2

(d) Aluminium chloride = AlCl

3

(e) Calcium carbonate = CaCO

3