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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