Hello - Looking to get some clarification on ICPMS quant. Recently got an instrument installed and trying to wrap my head around isotope abundance and determining the amount of an element, like copper, in a bulk sample. 1- does it matter what element isotope (disregarding interferences) we use for quant? Our install engineer said abundance would differ for different isotopes but the quantitation would be the same no matter isotope we used. Having a hard time grasping this -- if one isotope only has 30% abundance, how is it not present at a lower % in my sample? 2 - a guide online said typical ..read more

Is there a reason of why there seems to be a lot of discrepancy between wich alcohol is the more volatile, for what I know Ethyl alcohol (Ethanol) is more volatile because it have a higher vapor pressure over isopropyl alcohol (IPA/isopropanol), so why there is like a 50/50% of pages in the internet that say one or another is more volatile, someone knows why? submitted by /u/Mr_White2004 [visit reddit] [comments ..read more

I've looked at the index, found a PDF online, and searched using Ctrl + F for the term "zeroth." I looked at where it was in the previous edition, but I just can't find any mention of the zeroth law of thermodynamics in the 12th edition. Can anyone else find it, or am I just going mad? Lol. submitted by /u/WhichConsideration5 [visit reddit] [comments ..read more

Hi, chemists :) is there any common household substance (or easily obtained and can be handled safely with ordinary care) I could use to get the matted/felted lint off of my hairbrushes without damaging the brush? The bristles are plastic. These tiny fibers are wound so tightly around them that it’s difficult to even cut them off. (The bristles have a bead on the end that prevents just sliding them off.) So I wondered if I might be able to dissolve them off or even weaken them enough to pull off easily. I’m always looking for ways to extend the usable life of the objects I own. Thanks for rea ..read more

submitted by /u/AccomplishedDrop5834 [visit reddit] [comments ..read more

Hi all. I know someone asked a similar question to this 11 years ago. I have a 2.9 and will hopefully be able to get it up to a 3.1 as I graduate (1 year left). I was hoping what are my chances of getting a job and getting into grad school. For reference- I am taking advanced courses in almost all areas - advance O Chem, advance inorganic and even polymer chemistry. I was in research for one year in polymers and now am looking to join another research group for my senior year. Please be honest. I am also considering getting a masters before a PhD to help me get into a better program. submitt ..read more

I bought this can of sour ale several days ago. I left it in a bin and found it like this with 1/8 of the alcohol left. No liquid was found in the bin. Did the can explode and the liquid evaporate? submitted by /u/Fancy_Plenty5328 [visit reddit] [comments ..read more

Hello. I will be giving the avogadro chemistry olympiad this year conducted by waterloo. Could anyone provide me with the 2022/2023 paper so I can revise. Thanks submitted by /u/vid210307 [visit reddit] [comments ..read more

Chemistry, Elements interest me allot recently. I do like the Power side, but also deeper understanding of structures of materials to make things better. What are some “foot in the door” type of Chem jobs for someone that has no experience? But, I’m very detailed oriented and organized submitted by /u/Codeeveryday123 [visit reddit] [comments ..read more

submitted by /u/Classy_Til_Death [visit reddit] [comments ..read more