General Chemistry DAT Questions & Answers

General Chemistry DAT Questions & Answers - Simple Cubic has ____ atom per unit cell - Body-centered cubic has _____ atoms per unit cell - Face-centered cubic has _______ atoms per unit cell - CORRECT ANSWER1 2 4 -∆Srxn indicates..... - CORRECT ANSWER- that your products are more ORDERED than your reactants, and your reaction is entropically unfavorable. -q (heat) indicates... - CORRECT ANSWER- exothermic....heat is transferred from the system to the surrounding -w (work) indicates.... - CORRECT ANSWER- the system is doing work on the surrounding (expanding it) ∆Gº and Keq - CORRECT ANSWER- -∆Gº, K 1, reaction is spontaneous (products are favored) +∆Gº, K1, reaction is non-spontaneous (reactants are favored) ∆Gº = 0, K = 1, reaction and products are equally favored ∆Hrxn= - CORRECT ANSWER- ∑∆H products - ∑∆H reactancts +∆Srxn indicates.... - CORRECT ANSWER- that your products are more DISORDERED than your reactants, and your reaction is entropically favorable. +q (heat) indicates..... - CORRECT ANSWER- endothermic....heat is transferred from the surrounding to the system +w (work) indicates.... - CORRECT ANSWER- the surroundings are doing work on the system (compressing it) 1 C (coulomb) = 1 amp x 1 second - CORRECT ANSWER- KNOW THIS 1st order half life equation - CORRECT ANSWER- t1/2 = 0.693/k 3 Solubility rules of ionic compounds in water: - CORRECT ANSWER- 1. Most group 1 metal cations, NO3-, CLO4-, C2H3O2-, and NH4+ salts are SOLUBLE 2. Most Ag+, Pb2+, S2-, OH-, Hg22+, CO32-, and PO43- salts are INSOLUBLE 3. The solubles generally trump the insolubles. 5 electron configuration Exceptions - CORRECT ANSWER- Cr: [Ar]4s1 3d5 Mo: [Kr]5s1 4d5 Cu: [Ar]4s1 3d10 Ag: [Kr]5s1 4d10 Au: [Xe]6s1 4f14 5d10 A substances specific heat (C) is - CORRECT ANSWER- the amount of energy required to increase the temperature of 1 gram of it by 1.0ºC or 1.0K