Q

# Solve this problem Calculate the number of Carbon atoms in 39 g of Benzene.

Calculate the number of Carbon atoms in 39 g of Benzene.

• Option 1)

2 N

• Option 2)

5 N

• Option 3)

3 N

• Option 4)

6 N

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As we learnt in

Molar Mass -

The mass of one mole of a substance in grams is called its molar mass.

- wherein

Molar mass of water = 18 g mol-1

Molar mass of benzene = 78g

Number of moles in 39 g = 39/78 = 0.5 moles

Number of Carbon atoms = $6\times 5$ = 3 moles

Option 1)

2 N

Incorrect

Option 2)

5 N

Incorrect

Option 3)

3 N

Correct

Option 4)

6 N

Incorrect

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