How Many Atoms Are Present in a Sample of Pure

question 18

Multiple Choice

How many atoms are present in a sample of pure iron with a mass of 260 g? (The atomic mass of iron = 56 and N_A = 6.02 × 10²³)

• A) 3.9 × 10¹⁹
• B) 15.4 × 10²²
• C) 5.8 × 10²⁸
• D) 7.7 × 10²⁴
• E) ​9.6× 10²⁴

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