Hi, I have an apparatus which I'm using to electrolyse water into a mixture of hydrogen and oxygen.
I'm attempting to do some calculations based upon measurements I've made. What I want to do is c...
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Why is the first ionisation energy of chlorine is higher than that of sulphur ?
i am having trouble with the questions above please help
thanks
...
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Why an acqueous solution of CuSO4 doesn't react with an aluminum foil, but, if we add a little amount of NaCl, the reaction starts immediately?...
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this is one of lab question but i don't even understand plz help me
the question is
1. consider spherical atoms of radius R arranged in a cube closest-packed lattice. if a small cube is construct...
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Does anyone know where i can get a list of topics that will be on the exam, or old exams, or practice exams....
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I have 4 somewhat unknown samples of neoprene (different types and thicknesses). Is there a good source for data on the tensile strength of neoprene? I need to find out how resistant the material is...
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I understand that a cyclohexane is usually more stable when the substituted group, like methyl, is in the equatorial axis.
However, is it possble to determine the stability between, say, trans-1,2-...
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I was wondering if any pro chemists on here have a decent amount of experience doing suzuki coupling reactions. Currently I am trying to couple alkyl boronic acids to a bromo pyridine in the microwav...
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I have a question on a pre-lab that I have to do. The question is:
You determine that test tube number 3 is an acid. It is colorless, odorless and has a very low pH value. You test the sample w...
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2N2O5 heat-- 4NO2 + O2
1.618 g of O2 are produced, how much NO2 in grams are produced? I got 9.30 g NO2, is that right? I used 1 mol O2 = 32 g O2, and 1 mol NO2 = 46g NO2. I first converted g O2 to...
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We lit a piece of Mg so the formula is:
2Mg(s) + O2(g) HEAT-- 2MgO(s)
We then dissolved this in water so it would then be:
MgO(s) + H2O(l) -- Mg(OH)2(l)
Next we blew into water which is:
C...
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1.What will be produced when Cu(II)SO4 is mixed with sodium carbonate
2.What will be produced when Cu(II)SO4 is reacted with sodium carbonate and sodium hygrogencarbonate? What causes the differen...
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I have a question concering acid base reactions. All strong acid-strong base reactions produce a water soluble salt and water with the exception of what? I need to know that along with the formula uni...
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Are there any programs available for download that are the periodic table? I am looking for something I can keep on my laptop.
Also, can any of you recommend periodic table posters (I am looking f...
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Hello,
I am a A level student. I find difficulties with different chemical reactions.
Is there any simple way of predicting chemical reactions.
Is there any basic principles that can be followed in...
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Hello,
Has anyone heard of the Erikson-Pitteri Neighborhood? From what I can glean in seems to represent the potentials within crystal structures to revert to other possible stable structures. Her...
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In my assay of 50uL of 125-I-insulin I have 20,000 cpm at the expiry date. The half life of 125-I-Insulin is 60 days. So how can I calculate how many counts a 50uL sample of 125-I-labelled insulin wou...
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Hey everyone! I was wondering, when orbitals are hybridized, new hybrid Atomic Orbitals (AO) are formed. Now, when these hybrid atomic orbotals bond with another atomic orbitals, are molecular orbital...
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Hi,
I am starting to get desperate with my search to find information about the reaction of plastics with acids. I have searched all over the internet for a while now and I have found very little. ...
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During the heat treatment of Aluminum alloys, two processes: Solution and Precipitation heat treatment were used.
Should the hardness increase or decrease from the original alloy after solution hea...
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does diels-alder reaction needs any kind of catalist. I know that some catalists are used in assimetric diels alder sinthesis, but I dont need it. I need only diels-alder reaction....
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Apparently, my A level chemistry teacher told us that because of the molecular structure or something, water should be a gas. But why isn't it?
He didn't go into much detail as he wanted us to do a...
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Hi,
Could anyone lend some suggestions as to where to find information on acid's (pH's) effects on polymers (specifically plastics, but the general polymer/acid reactions are good too). I would esp...
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i really dont know where to start on this one. I know the main chain is nonane. The branch looks like isopropyl with a methy on it. However i dont think thats the right answer. All help is greatly apr...
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What are the basic principles behind oscillating reactions, I mean, if its known as 'chemical magic' what must it undergo to be such a thing?
I've been looking all over the web and havn't been abl...
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