What is the mass of 3.01 × 10²³ atoms of magnesium (Mg = 24)?
Correct answer D. 12 g
Explanation
3.01 × 10²³ atoms is half of Avogadro's number, that is 0.50 mol, and 0.50 mol × 24 g mol⁻¹ = 12 g of magnesium.
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