Question

Determine the mass in grams of 3.00 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is 74.92 g.)

Answer 1

Answer:

The answer to your question is: 0.373 g

Explanation:

Data

mass = ? g

atoms = 3 x 10 ²¹

AM = 74.92 g

Process

                     1 mol of As ------------------  6.023 x 10²³ atoms

                     x                  ------------------  3 x 10 ²¹  atoms

                     x = 4.98 x 10⁻³ moles

                     1 mol ------------------------   74.92 g

                     4.98 x 10⁻³ moles-------     x

                     x = (4.98 x 10⁻³ x 74.92)/1

                     x = 0.373 g of As