Given the following equations: 2 H2 (g) + O2 (g)--> 2 H2O (l) deltaH = -571.6 kJ N2 (g) + O2 (g)-->2 NO (g) deltaH = +180.5 kJ N2 (g) + 3 H2 (g) --->2 NH3 (g) deltaH = -92.22 kJ Determine the enthalpy change (deltaH) for the following reaction: 2 NO (g) + 5 H2 (g)--&...
October 8, 2009
Literature (Handle With Care by Jodi Picoult)
Please help me if you have read Jodi Picoult's latest book, Handle with Care. I'm doing a post card on it, so any information or help you provide is greatly appreciated. ~ what do you think would be a good 2-3 sentence annotation for this book? by annotation I mean ...
September 21, 2009
objective and eyepiece lens
What is the approximate magnification of a compound microscope with objective and eyepiece focal lengths of 0.3 cm and 3.6 cm, respectively, and a separation between lenses of 20 cm? The answer is 460. I tried finding the magnification for the eyepiece which was m=25/f=25/3.6=...
May 22, 2009
regarding the objective lens of a telescope and a microscope, for the eyepiece, where and what kind of image is formed? I kno that the image that is formed is a real, inverted image.. but where is it formed? thanks for your help.
May 20, 2009
Talk about how the bombing of Hiroshima and Nagasaki effected the culture and the beliefes (because most of the people believed suicide was ok durring that time like life was not important, they where promised if they commited suicide on the American war ships they would be ...
February 21, 2009
find the values of a and b given that matrix A= [a -4 -6] [-8 5 7] [-5 3 4] is the inverse of matrix B = [1 2 -2] [3 b 1] [-1 1 -3] It would really help if you showed how you did it. Thanks a lot!
November 18, 2008
well i was thinking that if the ecotone were to be polluted it would be able to sustain this pollution for a period of time due to the biodiversity. But, i was thiniking that eventually this pollution would spread to the surrounding ecozones and would affect them greatly due ...
September 23, 2008
I am writing a report for my current events class about women's issues. I am not allowed to use Wikipedia for my resources. Can someone direct me to some helpful websites or give some examples of women's issues besides inequality in the workforce between men and women?
May 19, 2008
i am having trouble on solving fractional equations such as: 2 3 7 ______ + _____ = ______________ x+3 x+4 x^2 +7x+12 factor the right side denominator, then look for what factors make up a common denominator. For each fraction, multiply the numerator and denominator with the ...
March 17, 2007
Why is it important to examine the unnumbered marks on a graduated cylinder before making a reading between the unnumbered lines? I'm not sure of the question but I'll take a stab at it. It must be to avoid parallax; i.e, you want the eye level with the meniscus. I ...
September 15, 2006