Question

D. Calculate the number of atom in each
of the following (Given : Atomic mass
of I= 127 u).
a. 254 u of iodine (1)
b. 254 g of iodine (I)​

Answer 1

• No. of atoms in 254 u of iodine= Given weight/molar mass

=254/127

=2 atom

• Each 127g of Iodine contains NA no. of atoms.

254g will contains=254×NA/127

=2×NA atoms