How many moles are equal to 1.2 x 1021 molecules of lithium?

Question

Chemistry

Rory Larson

3 January, 12:52

How many moles are equal to 1.2 x 1021 molecules of lithium?

+2

Answers (1)

Know the Answer?

Muffin · Answer 1

1.2 * 1021. atoms Li=2.0 * 10 - 3. mol Li.

Explanation:

Lithium is a metal. It does not exist as molecules. We can, however, determine the moles equal to 1.2 * 1021 atoms of lithium.

1 mol atoms=6.022 * 1023 atoms

1.2 * 1021 atoms Li * 1mol Li atoms 6.022 * 1023 atoms Li = 2.0 * 10 - 3 mol Li (rounded to two significant figures)