What is the mass of 1.63 × 10²¹ atoms of silicon? (N_A = 6.022 × 10²³ mol^-1)

Name: What is the mass of 1.63 × 10 21 atoms of silicon? (N A = 6.022 × 10 23 mol -1 )
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Quizplus · Accepted Answer

To find the mass, use the formula: mass = (number of atoms / Avogadro's number) × molar mass of silicon. The molar mass of silicon is approximately 28.08 g/mol. Thus, mass = (1.63 × 10^21 / 6.022 × 10^23) × 28.08 g/mol = 7.60 × 10^-2 g.

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