Question 3
Mole Concept and StoichiometryHow many atoms are present in 6.0g of magnesium? [Mg = 24, NA = 6.02 × 1023 mol−1]
- A.1.20 × 1022
- B.2.41 × 1022
- C.1.51 × 1023
- D.3.02 × 1023
Show the answer and explanation
Answer: C (1.51 × 1023)
Explanation
6.0/24 = 0.25 mol; 0.25 × 6.02 × 1023 = 1.51 × 1023 atoms.