AP Chemistry is a college level chemistry exam covering a variety of chemistry topics. Lets practice with some questions to get a taste of the exam. 1. In solid methane, the forces between neighboring molecules are best characterized as a. ionic b. covalent c. hydrogen bonds d. ion-dipole forces e. London dispersion forces Methane, CH4 is a non polar molecule. The forces between neighboring molecules are called intermolecular forces. A nonpolar molecule has only London disper

AP Chem 2012 questions and answers (1-6) (A) BeCl2 (B) SO2 (C) N2 (D) O2 (E) F2 Is a polar molecule. The easiest way to figure out whether a molecule is polar or non polar is to use these two principles: for a molecule to be nonpolar the central atom is surrounded by the sea atoms and has no lone pairs. Therefore, F2, O2, N2 are nonpolar (since its the same atoms connected to each other). BeCl2 is also nonpolar since beryllium is connected to two chlorines and has no lone pai

The free response questions to the 2018 AP Chemistry can be founder here: https://apcentral.collegeboard.org/pdf/ap18-frq-chemistry.pdf?course=ap-chemistry Let's now understand the questions and how to answer them. 1. A student performs an experiment to determine the value of the enthalpy change, DH, for the oxidation-reduction reaction represented by the balanced equation above. (a) Determine the oxidation number of Cl in NaOCl. To determine the oxidation number, we first ge

AP Chemistry consists of the following topics: Structure of the atom, periodic table, ionic and covalent compounds, stoichiometry, gases, li

Under which of the following conditions can an endothermic reaction be thermodynamically favorable? (A) ΔG is positive (B) ΔS is negative (C) TΔS > ΔH (D) TΔS = 0 (E) There are no conditions under which an endothermic reaction can be thermodynamically favorable. Answer and explanation: To be thermodynamically favorable, a reaction must have a negative ΔG (Gibbs Free Energy). The formula for Gibbs Free Energy is ΔG = ΔH - TΔS where ΔS is entropy and ΔH is enthalpy. Since the

Solid Al(NO3)3 is added to distilled water to produce a solution in which the concentration of nitrate, [NO3-], is 0.10 M. What is the concentration of aluminum ion, [Al3+], in this solution? (A) 0.010 M (B) 0.033 M (C) 0.066 M (D) 0.10 M (E) 0.30M Answer and Explanation: Looking at the formula Al(NO3)3, we notice that for one Al ion, there are three NO3 ions. Therefore when aluminum nitrate dissociates in water, it produces one aluminum ion and three nitrate ions per each fo