write the chemical formulae of the following.
(a) magnesium chloride
(b) calcium oxide
(c) copper nitrate
(d) aluminium chloride
(e) calcium carbonate
note- use and show the methods of criss-crossed.
Answers
Answer:
The chemical formula of a compound is a symbolic representation of its chemical composition. Chemical formulae provide insight into the elements that constitute the molecules of a compound and also the ratio in which the atoms of these elements combine to form such molecules.
(a) Magnesium chloride (MgCl2)
An inorganic compound consisting of one magnesium and two chloride ions. Magnesium chloride is used to treat or prevent magnesium deficiency (lack of natural magnesium in the body).
(b) Calcium oxide (CaO)
Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound.
(c) Copper nitrate Cu (NO3)2
Cupric Nitrate is a bluish-green, odourless crystalline (sand-like) material.
(d) Aluminium chloride (AlCl3)
Aluminium chloride (AlCl3) is the main compound of aluminium and chlorine. It is used to treat excessive sweating, also called hyperhidrosis.
(e) Calcium carbonate (CaCO3)
Calcium carbonate also is used as an antacid to relieve heartburn, acid indigestion, and upset stomach.
Explanation:
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Answer:
(a). MgCl2
b. CaO
c. Cu(NO3)2
d. AlCl₃
e. CaCO3