Form KEY CH115: General Chemistry 1 (Exam 1) September 24, 20191 Name:_______________________________ Lecture Section:__ Instructor: _________PART II: Questions 23-26. Show all your work in the space provided. You must show work to receive credit for these questions. Write your answer in the appropriate number of significant figures as indicated. 1.An element consists of three isotopes. Using the information in the table below, calculate the average atomic mass and identify the element. Atomic mass Abundance % 27.97693 92.21 28.97649 4.70 29.97376 ?
Form KEY CH115: General Chemistry 1 (Exam 1) September 24, 20192