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July 4, 2015

Posts by shawn


Total # Posts: 512

Chem
Nitric acid is produced commercially by the Ostwald process, represented by the following equations: 4NH3(g) + 5O2(g) > 4NO(g) + 6H2O(g) 2NO(g) + O2(g) > 2NO2 (g) 3NO2(g) + H2O(l) > 2HNO3(aq) + NO(g) What mass of NH3 must be used to produce 1.0x10^6 kg HNO3 by the ...
January 26, 2007

Biochemistry
True or False Cofactors and coenzymes are usually larger than enzymes and participate in catalysis . http://en.wikipedia.org/wiki/Coenzyme Notice the 3rd word under the definition when at the above site.
January 24, 2007

Biochemistry
True or False? Allosteric inhibitors always bind to the active site of an enzyme. http://www.mansfield.ohio-state.edu/~sabedon/biol1045.htm Scroll to 15 when at the site I've provided
January 24, 2007

Math - 8th grade
We are just starting this section, and I'm confused...Please help me understand how to solve this inequality: (one fifth r is less than two) 1/5r < 2 Also, simplify: (the #s are exponents) z3 . z3 x12/x3 By 1/5r you mean r/5 or 1/(5r)? z^3 . z^3 = z^6 x^12/x^3 = x^9 If ...
January 3, 2007

ap chemistry
Answer: In order to have a dipole moment (i.e., to be a polar molecule) a molecule must have polar bonds and must have a molecular geometry which is not symmetrical (i.e., one in which the vector sum of the bond dipoles  0). In CH2F2 the C-F and C-H bonds are polar and...
December 7, 2006

history
Why was the oil derrick built? http://en.wikipedia.org/wiki/Derrick_(lifting_device)
October 19, 2006

history
In what city was the first oil derrick built in texas?
October 19, 2006

history
I,m doing research on the oil derricks and pumping unit and need to know what material the first oil derrick was made from in Texas Since this is not my area of expertise, I searched Google under the key words "oil derrick history Texas" to get these possible sources...
October 19, 2006

Vocab/spelling
I need help I do Not understand the difference between country"s ,countrie"s, and countries? can some one help it is the same
October 19, 2006

Antiderivative
What is the antiderivative of e^2x? I know the antiderivative of e^x is e^x. Would e^2x's antiderivative still be e^2x?? You want F(x) such that F'(x)=e^2x Try F = (1/2)e^2x + C =(e^2x)/2 =(e^2x)/2
October 9, 2006

geography
what flatlands extend south from cheapsake bay to the east coast of florida? That region is often called the Inner Banks. This distinguishes it from the Outer Banks, which are barrier islands.
September 19, 2006

peer review
what are some advantages for both the reviewer and writer of peer reviews The author of a work that is reviewed by his/her peers gains prestige and legitimacy by having knowledgable people comment and review his work. The peers also can correct any errors in his work. The ...
July 14, 2005

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