Determine the mass in grams of 2.11 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is 74.92 g.)

Answer 1

Good morning. This problem can be solved using two steps.

Step 1: Convert atoms of arsenic to moles.

Step 2: Convert moles to grams.

We can solve the problem using the following set-up:

(2.11 x 10²¹ atoms) X (1.00 mol / 6.02 x 10²³ atoms) X (74.92g / 1.00 mol) = _________g of Arsenic

Hopefully that helps...