[Jakz34]

I was assigned some homework in chemistry today but my book is on back order.  I don't just want the answers, I want to know how to get the answers through working the problem.  BTW, this is for General Chemistry II, I took Gen Chem I 7 years ago.   and this is a review of where Gen Chem I leaves off,  so I am pretty lost until I get my book in.

Here are the questions:

1. For each of the following determine
A. Electronic geometry
B. Molecular geometry
C. The molecule's polarity (Polar/Non-Polar)

HNO2

CH3-

CO2

2.  Determine the mass of sodium carbonate, Na2CO3, required to make 500.00 mL of 0.09750 M aqueous solution.


If you want to post the answers that is fine but I really want to know what needs to be done (the work part of it) in order to get the answers.  TIA

[Yggdrasil]

The first step would be to draw a lewis structure for each of the compounds.  If you do not know how to do this, you should consult your chemistry text for an explanation.