How many atoms are in 1.00 kg of copper? A) 3.83 × 10²⁹ atoms B) 3.83 × 10²² atoms C) 15.74 atoms D) 2.61 × 10^-23 atoms E) 9.48 × 10²⁴ atoms

Question

Quizplus · Accepted Answer

To find the number of atoms, use Avogadro's number and the molar mass of copper. Copper has a molar mass of about 63.55 g/mol. 1 kg of copper is 1000 g, which is 1000/63.55 ≈ 15.74 moles. Multiply by Avogadro's number (6.022 × 10^23 atoms/mol) to get approximately 9.48 × 10^24 atoms.

How Many Atoms Are in 1