How Many Atoms Are Present in a Sample of Pure

Multiple Choice

How many atoms are present in a sample of pure iron with a mass of 300 g? (The atomic mass of iron = 56 and N_A = 6.02 x 10²³)

A) 1.8 x 10¹⁹
B) 6.7 x 10²²
C) 1.6 x 10²⁸
D) 3.2 x 10²⁴