What is the average mass, in grams, of one arsenic atom? (N_A = 6.022 × 10²³ mol^-1) A) 5.48 × 10^-23 g B) 33.0 g C) 74.9 g D) 1.24 × 10^-22 g E) 8.04 × 10²¹g

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Quizplus · Accepted Answer

The molar mass of arsenic is approximately 74.9 g/mol. One mole of arsenic contains 6.022 × 10^23 atoms, so the average mass of one arsenic atom is equal to the molar mass divided by Avogadro's number. Therefore, the average mass of one arsenic atom is (74.9 g/mol)/(6.022 × 10^23 atoms/mol) = 1.24 × 10^-22 g/atom. Therefore, the correct answer is D.

What Is the Average Mass, in Grams, of One Arsenic