I am a Bio major and am in Organic chem. These questions are review from Gen Chem 122. I'd really appreciate any and all help - if you can answer any one of the questions below, it'd really help me out. Explanations would be awesome, too, as I'm trying to LEARN this stuff - not just get answers for my homework.
1. Which of the following has nonpolar covalent bonds:
a)NaF b)H2O c)P4 d)NH3 e)BeCl3
2. What angle is associated with a central atom that has octahedral ELECTRONIC geometry?
a) 109.5 b)120 c)120 and 180 d)90 and 120 e)90 and 180
3. How many MOs are formed by the combination of the p atomic orbitals of 2 atoms?
a) 1 b) 2 c) 3 d) 6 e)12
4. What is the bond order of a species with 10 bonding electrons and 4 antibonding electrons?
a) 1 b) 1.5 c) 2 d) 2.5 e)3
5. The [OH-] = 1.3 X 10^-6 M for a 0.025 M solution of a weak base. Calculate the Kb for this weak base. (if someone could just explain how to do this, I had a pretty good grasp on acids/bases)
a)5.2 x 10^-5 b)3.1 x 10^-7 c)7.7 x 10^-9 d)4.0 x 10^-8 e)6.8 x 10^-11
Tags: