What id the mass in grams of 2.00 x 10^23 molecules of F2?

1 Answer
Feb 1, 2018

12.62g F2

Explanation:

You have to go from molecules, to moles, to grams
Remember 1 mole=6.021023 molecules
And then to go to grams you multiply moles by the atomic mass from the periodic table for the element, but since it's F2 you'll have to multiply that mass by 2. So:
Atomic mass of F2=38g. Use dimensional analysis using this conversion factors

21023 molecules1 mol F26.021023molecules38g1 mole F2=12.62g F2