Quiz 1 Preparation: Naming Simple Compounds

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Rachael_1H
Posts: 31
Joined: Fri Sep 25, 2015 3:00 am

Quiz 1 Preparation: Naming Simple Compounds

Postby Rachael_1H » Sun Oct 11, 2015 11:02 pm

"How many grams of ammonium chloride are needed to have 3.4 * 10^(-4) moles?"

From this question, which is from the second Quiz #1 Self Preparation Quiz, how are we supposed to figure out the formula for ammonium chloride without outside resources?

Are there certain formulas that we are supposed to have memorized?

JuliaPark2H
Posts: 19
Joined: Fri Sep 25, 2015 3:00 am

Re: Quiz 1 Preparation: Naming Simple Compounds

Postby JuliaPark2H » Sun Oct 11, 2015 11:27 pm

Hi Rachel,
I think based on the fundamentals assignment that we had to complete over the summer (and in the course reader review of introductory chemistry), it's important (or at least good/useful) to know common polyatomic ions/oxoanions...
Ammonium is NH4+.
There are also sulfate (SO4^2-), Chlorate (CLO3-)...

There's a brief list of the common ones in the course reader or online which would be useful to know by heart.
Knowing that ammonium is NH4+ and Chloride is Cl-, you can figure out that the ionic compound comes out to be NH4Cl.


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