CHEM 1711& 1811 INAL EXAM FALL 2017 23. Which of these elements has the smallest
ID: 699225 • Letter: C
Question
CHEM 1711& 1811 INAL EXAM FALL 2017 23. Which of these elements has the smallest first ionization energy? A. Na B. Ar D. Ca C. K 24. Which of these atoms has the largest radius? A. In B. Ga C. Se D. CI -25, which one of these is an acid anhydride? A. Na (s) C. SO, (g) D. NH,(g) B. Na(s) -26. Which one of these elements is not always present in an amino acid molecule? A. carborn B. oxygen C. nitrogen D. sulfur 6 Hoa) 2 C,li, () + 15 Orlg) + 490 12 co, (g) + -393.5 285.8 27. Calculate the enthalpy change for the reaction given , values (in kJ/mol, below each) A.-632.3kJ C -6534.8 kJ B. +2902.2 k D. +730.3J -28, which one of these molecules or ions has the largest bond order? (assume B. CN C. N2 D. C 29. Which of these sub-shells can have the largest total number of electrons? D. 4 C. 5d A. 7s B. -30. Consider a carbon (C) atom and an oxygen (O) atom that are near each other on the y axis. Which combination of atomic orbitals, win, could overlap to form a bond? Part III. Problems: partial credit may be given for work shown; credit may be deducted for not showing logical set-up and units. (24 points) Calculate the average speed (in meters per second) for nitrogen molecules in a laboratory flame where the temperature is 2423 K and the atmospheric pressure is 99.4 kPa. 1. m/sExplanation / Answer
23.
(C) K has small IE among the given
24.
(A) In has more atomic radius
25.
(C) SO2 is an acid anhydride of sulphurous acid H2SO3
26.
(D) Sulphur