tion 3: What Atoms? Part II

4 this station you will find two unknown samples you must identify using your mole sleuthing tools. Each vial is labeled

with the corresponding number of atoms contained in the vial and the mass of the vial (with lid).

1) Sample A

a. Mass of vial 4.2152a 22

b. Number of atoms.690 x 18°

c. Mass of sample + vial 37.12. keg

d. Mass of sample 21.11ng-

e. Moles of sample

f. Molar mass of sample_

g. What is the identity of sample A?

2) Sample B

a. Mass of vial .1392

b. Number of atoms 2.160 x 1023

c. Mass of sample + vial 2.05629

d. Mass of sample 317g

e. Moles of sample

f. Molar mass of sample

39.5 = (19) = (1.0)

g. What is the identity of sample B?,

3) How many grams would sample A containing 3.45 x 1023 atoms weigh? Use the MW from the periodic table, rather

than the calculated value from question 1.

3.46x10²

23

aboms p

1

mot pb 207.7gPb

6.022×10²3 a ph Imolpb

B

4) How many grams would sample B containing 7.56x1025 atoms weigh? Use the MW from the periodic table, rather

than the calculated value from question 1.