Question

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Following are the chemical formulae of some compounds. List the elements present and the number of atoms in each compound.
i. CaCO₃ ii. KNO₃
iii. H₂SO₄ iv. NaOH

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Answer 1

Answer:

(i) Al2(SO4)3

Aluminium sulphate: Aluminium sulfate is an industrial chemical used as a flocculating agent in the purification of drinking water

(ii) CaCl2

Calcium chloride: Calcium chloride is widely used as an additive in plastics, wastewater treatment plants

Explanation:

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Answer 2

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$\huge\underline\bold\orange{Answer:-}$

$\large\underline\bold\red{Given:-}$

• CaCO₃

• KNO₃

• H₂SO₄

• NaOH

$\large\underline\bold\red{What\:To\:Do:-}$

• List the elements present and the number of atoms in each compound .

$\large\underline\bold\red{Lets\:Start:-}$

$\rule{200px}{.3ex}$

(i) CaCO₃ :- The name of CaCO₃ is Calcium Carbonate .

$\large\underline\bold\red{Elements\:Present:-}$

• Calcium (Ca)

• Carbon (C)

• Oxygen (O)

$\large\underline\bold\red{Numbers\:of\:Atoms:-}$

• Calcium (Ca) = 1.

• Carbon (C) = 1.

• Oxygen (O) = 3.

\rule{200px}{.3ex}

(ii) KNO₃ :- The Name of KNO₃ is Potassium Nitrate .

$\large\underline\bold\red{Elements\:Present:-}$

• Potassium ( K )

• Nitrogen ( N )

• Oxygen ( O )

$\large\underline\bold\red{Numbers\:of\:Atoms:-}$

• Potassium ( K ) = 1.

• Nitrogen ( N ) = 1.

• Oxygen ( O ) = 3.

$\rule{200px}{.3ex}$

(iii) H₂SO₄ :- The name of H₂SO₄ is Sulphuric Acid .

$\large\underline\bold\red{Elements\:Present:-}$

• Hydrogen (H)

• Sulphur (S)

• Oxygen (O)

$\large\underline\bold\red{Numbers\:of\:Atoms:-}$

• Hydrogen (H) = 2.

• Sulphur (S) = 1.

• Oxygen (O) = 4.

$\rule{200px}{.3ex}$

(iv) NaOH :-The name of NaOH is Sodium Hydroxide .

[tex@]\large\underline\bold\red{Elements\:Present:-}[/tex]

• Sodium (Na)

• Oxygen(O)

• Hydrogen(H)

$\large\underline\bold\red{Numbers\:of\:Atoms:-}$

• Sodium (Na) = 1

• Oxygen(O) = 1

• Hydrogen(H) = 1.

$\rule{200px}{.3ex}$