Where Should I Zero the NMR Spectra of Dimethylacetamide in CDCl3?

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To zero the NMR spectra of Dimethylacetamide in CDCl3, it's important to identify a reference peak, typically TMS, which is not present in this case. The two smaller peaks near zero may be residual solvent signals, but they should not be used for zeroing. Instead, focus on the larger peaks corresponding to Dimethylacetamide for accurate referencing. If TMS was not added, consider using a known peak from the Dimethylacetamide spectrum for calibration. Proper zeroing is crucial for accurate interpretation of the NMR data.
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Homework Statement


I have a spectra of the NMR, I'm just confused on where to `zero' the spectra at?

Homework Equations


The Attempt at a Solution


There are two peaks around zero in the spectra (one is bigger than the other but not by much). Also the two peaks are much much smaller than the peaks I know are Dimethylacetamide. I just don't know where to zero it.

Any help is appreciated
 
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So, you didn't put any TMS in your CDCl3?
 
We used 3% TMA?
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
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