VHS CHEM S1 02 11 L3 Mid Unit Test GA
Name:
Date:
Graded Assignment
Mid-Unit Test, Part 2
Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for full credit.
(5 points)
Score
1. Calculate the average atomic mass of rubidium. Rubidium has two isotopes, 85Rb and 87Rb. 85Rb has an atomic mass of 84.912 amu and occurs at an abundance of 72.17%. 87Rb has an atomic mass of 86.909 amu and occurs at an abundance of 27.83%. Show your work.
Answer:
Average Atomic Mass = (84.912 ∗ 0.7217) + (86.909 ∗ 0.2783)
Average Atomic Mass = 85.4677651
Your Score
___ of 5
Date:
Graded Assignment
Mid-Unit Test, Part 2
Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for full credit.
(5 points)
Score
1. Calculate the average atomic mass of rubidium. Rubidium has two isotopes, 85Rb and 87Rb. 85Rb has an atomic mass of 84.912 amu and occurs at an abundance of 72.17%. 87Rb has an atomic mass of 86.909 amu and occurs at an abundance of 27.83%. Show your work.
Answer:
Average Atomic Mass = (84.912 ∗ 0.7217) + (86.909 ∗ 0.2783)
Average Atomic Mass = 85.4677651
Your Score
___ of 5