How many silicon atoms (Si)are contained in a 12.5 g sample of silicon? A)2.68 × 10²³ B)5.83 × 10^{− 22} C)1.35 × 10²⁴ D)1.71 × 10²¹

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Quizplus · Accepted Answer

To find the number of silicon atoms in a 12.5 g sample, we use the formula: number of atoms = (mass of sample / molar mass of element) × Avogadro's number. The molar mass of silicon is approximately 28.0855 g/mol. Therefore, the calculation is (12.5 g / 28.0855 g/mol) × 6.022 × 10^23 atoms/mol = 2.68 × 10^23 atoms.

How Many Silicon Atoms (Si)are Contained in a 12