Question

Write the chemical formula of the following.
(1)Magnesium Chloride
(2) Calcium chloride
(3) Copper Nitrate
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Answer 1

Magnesium chloride = MgCl2

Calcium chloride = CaCl2

Copper Nitrate = Cu(NO3)2

Answer 2

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1.Magnesium Chloride

Magnesium chloride is the name for the chemical compound with the formula MgCl₂ and its various hydrates MgCl₂ₓ. Anhydrous MgCl₂ contains 25.5% elemental magnesium by mass. These salts are typical ionic halides, being highly soluble in water. The hydrated magnesium chloride can be extracted from brine or sea water. Wikipedia

Formula: MgCl2

2.Calcium Chloride

Calcium chloride is an inorganic compound, a salt with the chemical formula CaCl2. It is a white coloured crystalline solid at room temperature, and it is highly soluble in water. It can be created by neutralising hydrochloric acid with calcium hydroxide.

Formula: CaCl2

3.Copper Nitrate

Copper(II) nitrate, Cu(NO3)2, is an inorganic compound that forms a blue crystalline solid. Anhydrous copper nitrate forms deep blue-green crystals and sublimes in a vacuum at 150-200 °C. Copper nitrate also occurs as five different hydrates, the most common ones being the hemipentahydrate and trihydrate.

Formula: Cu(NO3)2