Tuesday
May 21, 2013

# Posts by Crystal

Total # Posts: 687

College Chemistry
Now the reaction (2NO+2H2==> 2H20+N2) is believed to take place in three steps, the first of which is the fast reversible dimerization of NO to form N2O2, and the last of which (again fast) is the reaction N20 + H2 --> N2 + H2O. So, what is the slow (second) step? Then s...

Math- Trig
I have the TI-84 Plus Silver edition

Math- Trig
1. Determine the exact value of cos^-1 (pi/2). Give number and explanaton. 2. Determine the exact value of tan^-1(sq. root 3). with explanation. 3. Determine exact value of cos(cos^-1(19 pi)). with explanation. 4. Determine the exact value of sin(sin^-1(20 pi)). with explantat...

Chemistry
Nitrogen Monoxide reacts with hydrogen gas to form nitrogen gas and water (vapor). (i). write a balanced equation for this reaction. (ii). The reaction is experimentally found to be (approx) first-order in H2 and second order in in NO. Write the form if the experimentally-dete...

Chemistry
Im not quite sure what type of diagram this is, could u like describe an example of what to do?

Chemistry
Draw a reaction profile (diagram of energy vs reaction coordinate) for a hypothetical reaction AB +C <=> A+BC in which the foward reaction has an activation energy of 100kJ mol-1 and the backward reaction has an activation energy of 75kJ mol-1. (ii). a catalyst introduce...

Algebra
wht is the area of a circle with a circumference of 25 meters? I have to use pi(3.14) and round to the nearest square meter.

Algebra
thanks

Algebra
The circumfernce of a circus ring is 13 meters. Esimate the radius of the ring.

algebra
thanks really helped

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