Question

#4 and #5 :)

e used counting by weighing in this experiment though it would have been just as easy to count the pennies. In real life, when would we count by weighing when dealing with a powder or a liquid. 3. Potassium has two isotopes, 3K and K, If Kaccounts for 93.26% of the potassium, what is the average mass of an average potassium atom? (Use 39.00 and 41.00 as the masses of the isotopes.) 26= 0.14% 139.00) 195.26.1.) + (41.00 ) (6.747.5 198.74./.) + (4.747) 139.00)(0.952 e) p141.00 120.674):39.136 4. If you reached into a pile of potassium and pulled out a singleatom, would it have the mass calculated above? Explain. 5. Chlorine has two isotopes, "Cl and "Cl. If the mass of chlorine is 35.45g/mol, what is the percentage of each isotope in naturally occurring chlorine? (Use 35.00 and 37.00 as the masses of the isotopes.) 4 | ISOTOPES AND THE MOLE REPORT FORM

Answer 1

Ans 4: if we reach out to the pile and pull out one atom it will weigh either 39 or 41 and notcalculate above(39.13). But 93.26% probability is there that it weigh 39 and 6.74% probability that it weighs 41.

Ans 5 is in photo attached