Assertion (A): The formula mass in grams represents the mass of one mole of that substance.
Reason (R): Gram formula unit mass of a substance contains Avogadro’s number of entities.

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A is correct and R is incorrect.

Both A and R are correct and R is the correct explanation of A.

A is incorrect and R is correct.

Both A and R are correct but R is not correct explanation of A.

answer is A.

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Detailed Solution

In gram formula unit mass of a substance has Avogadro’s number of entities; $6.023 \times 10^{23}$ Weight of the formula mass in grams is equal to 1 mol of the substance.

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