Total # Posts: 42
How would you prepare 250ml of 0.2M sodium phosphate buffer of PH 6.4 if the following chemicals are available :dibasic sodium phosphate,monobasic sodium phosphate and 0.129M solution of NaOH. Assume that the pka1 pka2 pka3 of phosphoric acid are 2.12, 6.8 and 12.3 ...
November 28, 2016
Which answer choice states the most logical conclusion based on the following statement by Patrick? Ive never built anything before, much less a house. (1 point) 1. Patrick is not telling the truth. 2. Patrick feels uncertain in new 3. situations. 4.Patrick likes to ...
April 10, 2016
What is the unit m^-1? The question I'm working on says "an electron in the hydrogen atom makes a transition from an energy state of principal quantum number nt to n=1. If the photon emitted has a wavelength of 95 nm, what is the value of nt? I was trying to use the ...
November 17, 2015
"Just look at the graph," the player's agent said. "Phil's hits have doubled since last year. We are looking for a large raise and a long contract." Look at the graph. Graph: i.imgur. com/wY0gqtQ.png How can you redraw this graph so it appears that ...
September 23, 2014
Model radioactive decay using the notation t = time (independent variable) r(t) = amount of particular radioactive isotope present at time t (dependent variable) -λ = decay rate (parameter) Note that the minus sign is used so that λ > 0 a) Using this notation, ...
January 17, 2013
suppose that two point charges each with a charge of +1 coulomb are separated by a distance of 1 meter will they attract or repel ? determine the magnitude of the electrical force between them
January 16, 2013
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.150 M HClO(aq) with 0.150 M KOH(aq). The ionization constant for HClO is 4.0*10^-8 a)before addition of any KOH b)after addition of 25.0 mL of KOH c)after addition of 40.0 mL of KOH d)after ...
July 8, 2012
C25H52 + __38__ O2 -------> __25__ CO2 + __26__ H2O + energy a) Balance the equation. Count atoms below. ___________ carbon ___________ ___________hydrogen___________ ____________oxygen____________
May 22, 2012
Briefly describe the following court cases or laws/Acts by identifying (for each one): -The constitutional amendment or law involved -The opposing sides of the issue -The relationship of this particular legal issue to the larger issue of diversity: ethnic, cultural, racial, ...
October 3, 2011
At 10 am two cars start traveling toward each other from 287 miles apart. They passed each other at 1:30 pm. If the rate of the fster car exceeded the rate of the slower car by 6 miles per hour, find the rat (in mph) of the faster car. A. 38 B. 40 C. 44 D. 48 E. 50 I think it ...
November 7, 2010
LaQuisha has a sprinkler that waters a circular area. The diameter of the area that the sprinkler waters is 20 feet. The actual sprinkler is located at the origin of the coordinate plane. Write an equation that describes the circumference of the circular area that the ...
June 9, 2010
As a manager of a financial planning business you have two financial planners, Phil and Francis. In an hour, Phil can produce either one financial statement or answer 8 phone calls, while Francis can either produce 4 financial statements or answer 10 phone calls. Does either ...
February 11, 2010
actually- brother with an "'s" is the possesive form of the word brother. so it's actually brother('s) than brothers i thought that was it 'cause that's how the computer alphabetizes things, but i needed to make sure which word comes first in ...
January 8, 2007