Chemistry 210 Exam 1 WITH LATELY UPDATED SOLUTIONS

Chemistry 210 Exam 1 WITH LATELY
UPDATED SOLUTIONS




How many protons, neutrons, and electrons are in Ti 4+ ? - CORRECT ANSWER-22
N N N N N N N N N N N N N




protons, 18 electrons, 26 neutrons
N N N N N




Which of the following has 46 electrons
N N N N N N




A. 118 Sn 2+
N N N




50
N




B. 116 Sn4+
N N




50
N




C. 112 Cd 3+
N N N




48
N




D. 68 Ga 3+
N N N




31 - CORRECT ANSWER-B.
N N N N




What group of elements is 2a? - CORRECT ANSWER-Alkaline metals
N N N N N N N N N




Definition of an isotopes - CORRECT ANSWER-same atomic number, different mass
N N N N N N N N N N




number
N




What is the empirical formula of butyric acid, C4H8O2? - CORRECT ANSWER-C2H4O
N N N N N N N N N N N




What is the molar mass of aspartic acid, C4O4H7N? - CORRECT ANSWER-133 g/mol
N N N N N N N N N N N N




Element X consists of two isotopes. The abundance of one isotope is 32.88% and its atomic
N N N N N N N N N N N N N N N




mass is 44.8776 amu. The abundance of the second isotope is 67.22% and its atomic
N N N N N N N N N N N N N N N




mass is 46.9443 amu. What is the average atomic mass of Element X? - CORRECT
N N N N N N N N N N N N N N N




ANSWER-46.26 amu
N N




The element X has two naturally occurring isotopes and an average atomic mass of
N N N N N N N N N N N N N




121.757 amu. The first isotope has an atomic mass of 120.904 amu and a percent
N N N N N N N N N N N N N N N