Which is the correct formula to calculate the formula unit mass of a compound?

PYQ SSC JE (Junior Engineer) 2024

1. A.

   Multiplication of all the atomic masses of all the atoms within the formula

2. B.

   Summation of all the atomic weights of all the atoms within the formula

3. C.

   Summation of all the atomic masses of all the atoms within the formula

4. D.

   Multiplication of all the atomic weights of all the atoms within the formula

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