Naming complexes

cis-Co(en)2(NO2)2]+ trans-[Pt(NH3)3Cl3] I know that trans means opposite, cis and en I am not sure what that means but for some reason I am unable to identify the above complexes.

Computing energy and isotoic masses

Compute the energy released in the following fission reaction: 235 U + n 100 Mo 134 Sn + 2n The isotopic masses in g rams per mole are: U 235.0439; Mo 99.9076; and Sn 133.9125

Geometric isomers

This is more of a theoretical question I think. Co(NH3)5ClBr has two compounds for that one formula. My question is how would I be able to demonstrate that the two compounds are different and how would I be able to explain what kind of isomerism it illustrates?

writing balanced nuclear equations

How would I write a balanced nuclear equation showing that: 214 Bi undergoes beta decay. 195 Au undergoes electron capture. 38 K undergoes positron emission. 242 Pu emits alpha radiation.

Equilibrium concentrations

If in an 0.050 M aqueous solution of hydroxlamine, HONH2 at 20 degrees Celcius, [OH-] = 2.3 x 10 ^-5M, What is Kb for HONH2 at 20 degrees Celcius, and what are the equilibrium concentrations of HONH2, HONH3, and OH- in a 0.0010 M HONH2 solution. HONH2 + H2O =HONH3 + OH

Equlibrium Concentrations

For the equilibrium PH3BCl <> PH3 + BCl3, Kp = .052 at 60 degrees Celcius. Further, a solid PH3BCl3 is added to a closed .500 L vessel at 60 degrees celcius; the vessel is then charged with .0216 mol of BCl3. How would I calculate Kc and what would be the equlibrium concentration of PH3?

Radioactivity and half life problems

Cobalt 60 has a half life of 5.26 year. The Cobolt 60 in a certain radiation therapy unit must be replaced whenever its radioactivity falls to 80 percent of the original sample. If the original sample was purchased in 11/2002 when will it be necessary to replace the Cobalt 60?

Osmotic pressure problem

Brackish water with a salt content around .5 percent by mass is found in semiarid regions such as the American Southwest. Assuming that brackish water has the same density as pure water and contains only sodium chloride, estimate the osmotic pressure of brackish water at 298K. A hint is that the the total molarity is the sum ...continues

pH problem

when microorganisms reproduce they release waste products that may change the pH and prevent further reproduction. Therefore culture mediums for growing microorganisms are usually buffered. The median for the culture of lactobacilli includes a buffer prepared by dissolving 25 grams K2HPO4 and 25 grams KH2PO4 in water and dilut ...continues

Product of decay for Cl 36

There is Chlorine 35, chlorine 36, and chlorine 37. Cl 35 and Cl 37 are stable. Why would Cl 36 be less stable than either of the two isotopes and how would you predict the product of decay for Cl 36?