DAT General Chemistry Questions & Answers

DAT General Chemistry Questions & Answers -log(0.01) = - CORRECT ANSWER - 2 :) - CORRECT ANSWER - You can do it! Keep going! 1. _______ produce basic solutions in water. 2. ___________ produce acidic solutions in water. - CORRECT ANSWER - 1. Metal oxides produce basic solutions in water. 2. Non-metal oxides produce acidic solutions in water. Transition metal oxides can either be acidic or basic depending on the oxidation number of the metal. The higher the oxidation number, the more acidic the corresponding oxide. For example, CrO (Cr has a +2 charge) is a basic oxide, but CrO3 (where Cr has a +6 charge) is an acidic oxide. 1) kinetic energy of an electron (photoelectric effect) 2) Heinsenberg uncertainty - CORRECT ANSWER - KEₑ₋ = Ephoton - work function work function: max energy needed to ionize electron - it is impossible to determine a subatomic particle's position and its momentum with perfect accuracy 10x10^-11 equals 1x10 to the negative what? - CORRECT ANSWER - 1x10^-10 (the square root of which is 1x10^-5) about entropy... - CORRECT ANSWER - - entropy increases with temperature - it's a measure if the disorder in a system - a spontaneous reaction can produce an increase in entropy - the entropy of a foward reaction is not the same as the entropy of the reverse reaction - the entropy of a gas vessel increases as volume increases absorbance (spectrophotometer) - CORRECT ANSWER - Abs= ecl e: molar extinction coefficient (molar absorptivity) c: sample's concentration l: path lengh absorption / emission line spectra - CORRECT ANSWER - ΔE = Ephoton