Consider the diprotic acid H2A with K1 =1.00 X 10-4 and K2 = 1.00 X 10-8 . Find the pH and concentrations of H2A, HA- , and A2- in: (a) 0.100 M H2A; (b) 0.100 M NaHA; (c) 0.100 M Na2A.
September 20, 2015
A Van de Graaff generator is a device for generating a large electric potential by building up charge on a hollow metal sphere. A typical classroom-demonstration model has a diameter of 30 cm. How much charge is needed on the sphere for its potential to be 530,000 V?
April 1, 2015
A player passes a 0.600-kg basketball down court for a fast break. The ball leaves the player's hands with a speed of 8.20m/s and slows down to 7.30m/s at its highest point.Ignoring air resistance, how high above the release point is the ball when it is at its maximum height?
December 9, 2014
BTW, it is meaningless to talk about cheating in this course. The problems are not authentic. They are taken from a set of quantum mechanics/ quantum computing problems that is moving from a course to a course. Some "non-cheaters" had no quarrel with the course ...
October 12, 2013
Employee's Earnings statement Name: Martin Fischer Earnings Regular Pay- $225.86 Overtime pay- $88.90 Gross Pay-$314.76 Total Deductions-$107.95 Net Pay-$206.81 Taxes Withheld Federal State Local FICA Other $48.20 $6.88 $4.55 $23.64 $0.00 Personal Deductions Pension-$12.55...
October 28, 2010