As pure molecular solids, which of the following exhibits dipole-dipole intermolecular forces: HBr, NBr3, SBr2, and CBr4? (Electronegativity values: H = 2.1, Br = 2.8, N = 3.0, S = 2.5, C = 2.5)   a. HBr only b. CBr4 only c. HBr and SBr2 d. NBr3 and CBr4 e. HBr, NBr3, and SBr2

Two point charges, q1 and q2, are separated by a distance of `d` m. The magnitude of the charge on q1 is half that of the charge on q2. If each charge exerts a force of magnitude `f` N on the other, determine the magnitude of q2. k = 8.99 x 109 Nm2/C2 Your answer should be in units of C (1 C = 10-6 C) and rounded to the nearest whole number. Don’t type in the units in your answer.

Three point charges are at fixed positions on the x-axis, q1 at x = 0, q2 at x = a, and q3 at x = 2a. Find the total electrical potential energy of the system of three charges. Let q1 = q2 = q3 = 2 x 10-6 C and a = 100 m.

Les expressions avec avoir. Complete the following sentences with an « avoir » expression. Make sure to conjugate the verb avoir when necessary. Fill out the first blank with the form of “avoir” and the second blank with the expression.             î    é    è   à   ê   â   ù  ç                   or      e/    a\    o^     i:         2) Il est tard (late) et le marchand de sable (the sand man) va venir maintenant parce qu’il est l’heure de dormir. Les enfants [a] (avoir) très [e].

Marc and Marie are exact opposites.  Choose the most appropriate adjective to describe Sara or Thomas based upon the information provided about the other person. Write the correct form of the adjective in ONE of the blanks depending if the adjective goes before or after the noun and put an X in the remaining blank.   î    é    è   à   ê   â   ù  ç   ô                     or      e/    a\    o^     i:  Adjective bank of possibilities: amusant, beau, bête, bon, conservateur, ennuyeux, généreux, grand, gentil, gros, jeune, intelligent, laid, mince, paresseux, petit, roux, sérieux, sportif, travailleur, triste, vieux Comme étudiant, Marc est vraiment mauvais, mais Marie?  C’est une [a6] étudiante [b6].

A liquid has an enthalpy of vaporization of 30.4 kJ/mol. At 269 K it has a vapor pressure of 102 mmHg. What is the normal boiling point of this liquid?  (R = 8.314 J/(K· mol)) a. 287 K b. 316 K c. 269 K d. 253 K e. 234 K

Yersinia pestis causes what type of medical condition?

Ascertaining a patient’s gender identity can be done in a two step process that should include which of the following pairs of questions?

Les expressions avec avoir. Complete the following sentences with an « avoir » expression. Make sure to conjugate the verb avoir when necessary. Fill out the first blank with the form of “avoir” and the second blank with the expression.          î    é    è   à   ê   â   ù  ç                         or      e/    a\    o^     i:   3) Marie pense que la capitale de la France c’est Dublin.  Elle [a] (avoir)  [e].

What are the screening recommendations for Veterans when it comes to suicide risk? Choose the best answer.