Question

Assertion(A): The number of moles of He in 52g of He is 13. (1)

Reason(R): The number of moles of an atom is the ratio of its given mass to its molar

mass.​

Answer 1

Explanation:

Assertion (A) is correct because the number of moles in He in 52 g = 13 moles

Proof: 4g of He = 1 mole of He

1g of He = 1/4 moles of he

52g of He = 1/4×52

=13 moles

Reason(R) is also correct because the formula of finding No. of moles = given mass / molar mass.

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