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yes i know that. But I keep getting the wrong answer. My ppm concentration for the highest absorbance standard is only 10. (something) ppm. The answers for the concentrations of the samples are A-16.4ppm, B-23.6ppm, C-10.8ppm, D-2.9ppm so my concentration for the standard is definitely wrong. :(

This question is the same one in conq chem, literally been doing it for all of today and yesterday. In order to measure the concentration of mercury in sea water near an industrial plant, a team of chemsits used AAS. They first calibrated their instrument by admitting some standard solutions...

Nice, thanks for explaining but isn't NaHSO4 acidic with pH of 1.7 or something? It says so in conquering chem and I was wondering why. I get what your saying at that seems like the right answer to me but CC says otherwise.

I got a coupla questions Is NaHSO4 an acidic or basic salt. Isn't bicarbonate ion amphiprotic? a and also is CaCl2 acidic, basic or neutral. By Bronsted Lowry theory of acid and bases, Ca is from weak base(CaOH) and Cl is from strong acid HCl so wouldn't it make a weak acid. Wikipedia says...

120 people in my year of 205 or so students do Ext2. I used to do it. I feel like crap for dropping out, people keep saying how stupid my action was.

I dropped down from 4 U to 3U and I think that all the people in my class are really dumb. Has anyone ever done really well with just 3U and will these dumb people effect my learning?

Wow, for eco i've got economies of scale. It might be easy I dunno but I haven't been tuning in and I remember getting essentially a zero in a class test. so i guess i failed eco. The effort I coulda put into eco I put instead into english to make the 3 unit cut off, which hopefully I made...

haha