What is the average mass, in grams, of one arsenic atom? A)5.48 * 10^-23 g B)33.0 g C)74.9 g D)1.24 * 10^-22 g E)8.04 * 10²¹g

Question

Quizplus · Accepted Answer

The average mass of one arsenic atom is calculated by adding the masses of its protons, neutrons, and electrons. The correct atomic mass for arsenic is 74.92 u. To convert this to grams per atom, we use the conversion factor 1 u = 1.66 x 10^-24 g. Therefore, the average mass of one arsenic atom is:

74.92 u x 1.66 x 10^-24 g/u = 1.24 x 10^-22 g/atom

Choice D matches this value.

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