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Intermolecular Forces and Physical Properties

#### Q. Predict the substance that is likely to have the greatest molar solubility in water. a) C6H6 b) CH3CH3 c) BaSO4 d) CCl4 e) NH3

Solved • Dec 7, 2019

Enthalpy of Formation

#### Q. Given the following reactions: N2(g) + 2 O2(g) → 2 NO2(g) ΔH°r = +67.4 kJ/mol N2H4(l) + 3 O2(g) → 2 NO2(g) + 2 H2O(l) ΔH°r = -554.4 kJ/mol 2 H2(g) + O2(g) → 2 H2O(l) ΔH°r = -571.5 kJ/mol Calculate ΔH°f of N2H4(l), N2(g) + 2 H2(g) → N2H4(l)

Solved • Dec 7, 2019

Reaction Mechanism

#### Q. how to draw a transition state & what would this whole thing look like drawn at the molecular level?

Solved • Dec 7, 2019

Phase Diagram

#### Q. Which of the following statements based on the phase diagram below is/are correct? 1. moving from point b to a results in a phase change from liquid to solid. 2. A solid exists at point d. 3. At point c, the gas and liquid phases coexist together at equilibrium

Solved • Dec 7, 2019

Weak Acids

#### Q. What is the pH of a 0.010 M solution of NR3H+Cl- solution? (Kb for NR3 = 5.9 x 10-7). a. 7.00 b. 9.11 c. 2.75 d. 11.25 e. 4.89 I think I can manipulate the formulas to find pH, I'm just not entirely sure how to write out the reaction to make an ICE table.

Solved • Dec 7, 2019

Solutions, Molarity and Intermolecular Forces

#### Q. One of these forces may be unimportant in the formation of a solution. Which is it?

Solved • Dec 7, 2019

The Particle Nature of Light

#### Q. How many photons are contained in a flash of red light from helium-neon laser at 632.8nm wavelength that has an energy of 150 KJ?

Solved • Dec 7, 2019