Recent content by cncbmb

Homework Statement The substance CoBr3 dot 4 NH3 dot 2 H2O ha a molar conductivity of 42 kS/m at infinite dilution. Indicate the composition of the coordination sphere. Homework Equations I don't know any relevant equations. The Attempt at a Solution Where can we read about how...

This isn't a homework question, and I've always wondered about this. My chemistry teacher told me to look up "coordinate chemistry" in a textbook, but the textbook did not have the answer. How can we predict the geometry of a coordination compound? I googled my question first, and I...

Thanks.

pKb CH3NH2 3.36 CH3CH2NH2 3.27 CH3CH2CH2NH2 3.16 CH3CH2CH2CH2NH2 3.39 Why does the pattern break for CH3CH2CH2CH2NH2?

I read that pKb for the organic bases below generally decreases as the alkyl chain gets longer: http://www.chemguide.co.uk/basicorg/acidbase/bases.html#top pKb CH3NH2 3.36 CH3CH2NH2 3.27 CH3CH2CH2NH2 3.16 CH3CH2CH2CH2NH2 3.39 Why does the pattern break for CH3CH2CH2CH2NH2? Why is...

Why can we assume that the reaction goes to completion?

Homework Statement We have two solutions: One solution that has 0.300 L of 0.100 M acetic acid, and the other with 0.100 L of 0.200 M CN^-. We mix the two solutions. At equilibrium, what is the pH of the resulting solution? Homework Equations For acetic acid, K_a=1.8*10^{-5} For CN^-...

What is the device used to measure percent light absorption in pigments? I remember finding the percent light absorption in the pigments of some vegetables for a high school bio lab. I am pretty sure the device used was not specific for pigments. The device was user friendly- we just stuck...

Is it alright to reuse plastic water bottles or leave them out in the sun or heat before using them? My dear mother seems to think that it isn't alright but I am not sure why. Is there a more reliable source that answers this question than a first link off google...

What is the difference between biochemistry and organic chemistry?

1. The Problem The Following Steps Occur in Order: a. Aqueous silver nitrate is added to a sodium bromide solution to form a white precipitate. b. Aqeuous ammonia is added to the above. The contents of the container change color slightly and there is still a precipitate. c. After step b...

1. Which of the following substances is most likely to be soluble in a nonpolar solvent? a. glucose b. graphite c. sulfur d. lithium fluoride Homework Equations Is there a way to figure out which of the nonpolar molecules above would most likely be soluble using the structure of the...

How would we work with this problem using moles? How could we test of one half mole of oxygen would be "a good fit?" How would we know what that O_2 would turn into after being reduced?

Homework Statement Give the net redox equations for the following reactions which occur in base solution. Fe(OH)_2+ O_2 \rightarrow Fe(OH)_3 Homework Equations noneThe Attempt at a Solution The oxidation half reaction is Fe(OH)_+OH^{-1}\rightarrow Fe(OH)_3 + e^{-}. How do we find the...

Hi. How would you start learning physics if you had no background in it? -If you hadn't taken calculus yet? Here is my situation: I have no background in physics. I haven't taken algebra 2 yet. At my school, algebra 2 is pretty much a class about very basic algebra again with a little...