Recent content by Teemo

Is there any way (ex. MO theory, valence electrons, etc) to determine the coordination number of a metal ion with another ion? I know it is generally a multiple of the oxidation number of the metal ion. However, for something like Ni and NH3. how would I know that it's a coordination number of 6?

Yes, this is exactly the explanation I found elsewhere! Thank you so much, Borek!

The initial temperature is 24 degrees Celsius and the final temperature is 29 degrees Celsius. However, 5 degrees Celsius as a delta T is not an option given :/

Homework Statement See Thumbnail. Homework Equations N/A The Attempt at a Solution I am absolutely floored as how to do this problem.

Thank you so much!

Would it be 1? I feel like I'm missing something obvious o_O

Homework Statement The reduction of O2 to H2O in acidic solution has a standard reduction potential of +1.23 V. What is the effect on the half-cell potential at 25 °C when the pH of the solution is increased by one unit? O2(g) + 4H+(aq) + 4e- –> 2 H2O(l) (A) The half-cell potential...

Is there any way you could manipulate the given rate to fit the rate law?

Homework Statement http://i.imgur.com/Ypqcw19.png Homework Equations N/A The Attempt at a Solution Since the reaction involves the breaking of bonds in MCO3, I assume we are looking at coulomb interactions. I'd think the answer is D) BaCO3 because all the options have a 2+ charge, but barium...

Homework Statement Internal Energy Change Homework Equations N/A The Attempt at a Solution If internal energy change equals enthalpy change, then I am looking for the reaction which has the enthalpy change closest to zero. I know it cannot be A, as the formation of water is highly exothermic...

Again, sorry for being late to reply, but thanks. I guess I'll just have to memorize some of the common elements's atomic radii ?:)

Sorry for the extremely late reply. But thanks, that makes so much more sense!

It's the wrong answer :oops:

Homework Statement Magnesium (Z = 12) has isotopes that range from Mg–20 to Mg–31. Only Mg–24, Mg–25, and Mg–26 are not radioactive. What mode of radioactive decay would convert Mg–20, Mg–21, Mg–22, and Mg–23 into stable isotopes most quickly? (A) electron emission (B) alpha particle emission...

Homework Statement 45. Consider the ions Li+, Na+, Be2+, and Mg2+. Which two are closest to one another in size? (A) Li+ and Na+ (B) Be2+ and Mg2+ (C) Be2+ and Li+ (D) Li+ and Mg2+ Homework Equations N/A The Attempt at a Solution I thought it wouldn't be A, B, or D due to the pairs having...