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Intermolecular Forces

Q. What is the strongest type of intermolecular forces formed between the molecules of CH3OH? a) dipole-dipole b) dispersion c) hydrogen bonding d) ion-dipole e) covalent bonding

Solved • Dec 7, 2019

Mass Percent Formula

Q. Concentrated HCl has a concentration of 36.0% HCl by mass. Calculate the molar concentration of HCl. The density of the HCl solution = 1.19 g/mL.

Solved • Dec 7, 2019

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