November 27, 2015

Posts by katherine

Total # Posts: 540

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

9/25 divided by 4/5 - 1/10
September 27, 2009

September 21, 2009

A postage stamp.
September 21, 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

17/51 simplest form 19/38 simplest form 10/32 simplest form show work pweeeese T3T
August 31, 2009

14/35 in simplest form show work too!? Heeeelp Dx
August 31, 2009

14/35 in simplest form? with work
August 31, 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

physics lens
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

the more basic the the more nucleophilic?
May 17, 2009

japan study
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

So here's the problem: 6a^-2 + 9a^2 all over 3a^-2 The answer is suppose to be 2 + 3a^4 I keep getting the answer as 5. Can you show me how to solve this problem correctly?
February 7, 2009

8th grade Social Studies
How did the Cotton Gin effect slavery?
February 2, 2009

How do you chance an equation from standard form to slope-intercept form?
December 10, 2008

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

social studies
How do each of the eight strands of social studies tie into the times and life of Christopher Columbus?
October 27, 2008

an orange has 20 fewer calories than a banana. If 7 bananas have the same number of calories as 9 oranges, how many calories are in a banana?
September 29, 2008

The sum of two numbers is 24. Seven times the smaller number is the same as 5 times the larger number. Find the smaller number
September 29, 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

speculate about how pollution of the ecotone might affect the surrounding ecozones.
September 23, 2008

What is the human niche?
September 18, 2008

Gender Inequalities
Are there any inequalities between men and women in the armed forces?
May 27, 2008

education inequalities
What are some inequalities in education between men and women?
May 23, 2008

Women's Issues
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

IRVINE 2012!!!
April 7, 2008

Damon, the problem in the book is 5/8*t + 2/15*t = 17/20
February 21, 2008

the problem in the book is 5/8*t + 2/15*t = 17/20
February 21, 2008

can someone help me with the steps to problem below, the fractions are throwing me off 5/8t+2/15t=17/20
February 21, 2008

Math (Grade 12 Data Management)
What is the difference between a histogram and bar graph
November 28, 2007

Geometry Proofs HELP!!
how do i do this? given: m//n g//h Prove: angle 4 congruent to angle 16
November 21, 2007

November 21, 2007

you have to start by writing the given
November 21, 2007

why you dont you read it?
November 21, 2007

you make it a equation with (f)x its really not hard
November 21, 2007

Social Studies
Who were the mummy-shaped figures that worked in the after life's fields for a mummy?
October 22, 2007

October 7, 2007

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

Modern World History
October 28, 2006

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

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