Does $\ce{CF3COOH}$ undergo decarboxylation ? Why or why not?
Attempt:
I feel it should decarboxylate because $\ce{CF3-}$ carbanion must be stable due to fluorine's -I (electron withdrawing) effect , but I am not sure.
Most of you know that I am a vocal opponent of the effort criteria anyway, but I am getting a bit unnerved as of how inconsistent it is applied.
I am posting this as a specific example here only because I am too lazy to dig up others and this one simply is the freshest.
The question I am concer...
I got option $\ce{C}$ as an answer, but the answer is $\ce{D}$ as well. I have never seen the difference in reduction by change of catalyst. I have absolutely no idea about $\ce{D}$. Is there any difference?
@Zhe Thanks, but we generally don't do anything (esp. deleting) without a second opinion. In this case it seemed easier talking directly to you than spam another one in spring cleaning :D
> Ammonia gas NH3 is found in STP conditions and occupies volume V completely dissolved in distilled water. The concentration of the solution is 20 % by weight and the density is 0.9 g/ml. The final volume of the resulting solution is 500 ml.
Hm, I guess they actually mean
> Ammonia gas NH3 is found in STP conditions and occupies volume V. Completely dissolved in distilled water, the concentration of the solution is 20 % by weight and the density is 0.9 g/ml. The final volume of the resulting solution is 500 ml.
@Abcd There really is no point adding the word attempt to the question body. If it is an attempt at solving the problem, that should be fairly obvious... — Martin - マーチン ♦6 hours ago
@Martin-マーチン I think highlighting attempt is OK. It doesn't do any harm.
@Abcd This decarboxylation q. maybe wouldn't fit into homework, but is unclear. Like every such acid undergoes decarboxylation in one situation or another.
@Mithoron Why is the harndness of Aluminium and Copper different in terms of indentation?
Somebody replied me
The electron configuration of Al (Ne 2s2 p1), where in the most outer electron shell (the 3rd.) there there are 2 on the s-level and only 1 on the p-level. But copper has not only the 3p level filled (6electrons), but also the 4s shell (2 electrons) and has further 10 electrons on the 3d level. It is more than double as heavy than Al.
However Electrons don't have much much mass that will contribute.Please explicitly get into the greated detail of it.
An oil-fired boiler takes in feed water at 75 °C and produces wet steam at a pressure of 5 bar. The steam flow rate 1.50 t/h with a dryness fraction of 0.89. The fuel consumption rate is 6.10 kg/min and its net calorific value is 41 MJ/kg. Determine the thermal efficiency of the boiler.
@Abcd I think it's starting the obvious. If it's there I won't edit it out, but I wouldn't edit it in either. A question should stand on its own without any meta commentary. I think these things are in the end distracting.
Edit statements, however, are even worse. They usually artificially separate a question into parts. That's not helpful in the long run. If anyone is interested in the edit history, there's already a link for it. But that is of course a different story...