Which molecule has the shortest bond length A N 2 B O 2 C Cl 2 D Br 2 47 An

Which molecule has the shortest bond length a n 2 b o

This preview shows page 9 - 12 out of 15 pages.

46. Which molecule has the shortest bond length? (A) N2(B) O2(C) Cl2(D) Br247. An exothermic equilibrium reaction will 48. Consider the endothermic equilibrium reaction of BaCO3(s) <===> BaO(s) + CO2(g). Which would produce more BaO(s)? (D) All of the above would shift the equilibrium left. 49. If the coefficients of all species in a chemical reaction are divided in half, the reaction is still balanced. The new reaction would have an equilibrium constant with a value that is _______ the value for the first reaction. 50. Which crystal packing of atoms results in proportionately less unoccupied volume per unit cell? (A) simple cubic (B) body centered cubic
Background image
(C) face centered cubic (D) The unoccupied volume is constant for all. PART II 51. In the series HF, HCl, HBr, HI, the last three compounds demonstrate increasing normal boiling points with increasing molar mass, but HF possesses an unusually high boiling point, as noted in the table below. What is the reason for HF's unusual behavior? Hydrogen halide Boilng point HF +120 °C HCl -84.9 °C HBr -67.0 °C HI -50.8 °C 52. Consider two solutions: a 0.50 msolution of Ca(NO3)2and a 0.75 msolution of KCl. Which statement about the solutions is correct? 53. A 0.73 mol sample of a salt of sodium is dissolved in 150 g of pure water. The boiling point of the solution is 105 °C. The most likely anion in this solution is : (Kb= 0.512 °C m¯1). 54. Which is a base under the Arrhenius, Bronsted-Lowry and Lewis theories? (A) NH3(B) OH¯
Background image
(C) O2¯ (D) H2O 55. A saturated solution of Mg(OH)2has a molar solubility of 1.44 x 10¯4M. What is its solubility product constant, Ksp? 56. The Kspfor Fe(IO3)3is 1.0 x 10¯14. A solution containing Fe3+is mixed with a solution containing IO3¯, and at the instant of mixing, [Fe3+] = 10¯4M and [IO3¯] = 10¯5M. Which statement is accurate? 57. Which equation represents the standard heat of formation reaction for P4O10(s)? (A) 2 P2(g) + 5 O2(g) ---> P4O10(s) (B) 2 P2(s) + 5 O2(g) ---> P4O10(s) (C) P4(g) + 5 O2(g) ---> P4O10(s) (D) P4(s) + 5 O2(g) ---> P4O10(s)
Background image
Image of page 12

You've reached the end of your free preview.

Want to read all 15 pages?

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes