Recent content by new hand

Homework Statement There is a radioactive source plaed in front of the GM counter to predict the kind of radiation emmitted by the source. 1 : When the GM counter moves 5 cm away from the source, the count rate drops significantly. 2 : When a 5mm aluminium sheet is inserted...

That's really nice! Thank you anyway ^^

Homework Statement 3(√x2+xy)-2x2+10=0The Attempt at a Solution There are x and y on the same side. If I expand it directly, it is so complicated! Can anyone show me the full step? Thanks!

As CH3CHClCH2CH3 is changed to CH3CH(OH)CH2CH3 Oh my mistake! is the answer butan-2-ol?

As OH group will replace the chlorine atom in the second carbon atom (counted from the left)as written in the question Correct or not?

Homework Statement ______________Stgae 1 [/B] P:C3H6O -----> _________________Br2 in organic solvent Q:C3H6OBr2 Stage 2 -->R:C3H5Br3 1.What is the structural formula of P and Q respectively? 2.What is the reagents in the conversion of Q to R?? (1) Phosphorous tribromide liquid (2)...

My answer is 2-methylpropanol but someone told me that it is butan-1-ol which one is correct?

can you draw the structural formula for me?? I am really confused

Homework Statement CH2=CHCHCH3 + X --> CH3CHClCH2CH3 CH3CHClCH2CH3 + KOH(aq) --> Y then what is the structural formula of Y ?? (show clearly where the functional group located)The Attempt at a Solution It is obvious that X is HCl, and Y should be an alcohol but where is the hydroxyl group be...

I want to ask what is the full equation of acidified potassium permanganate and potassium iodide? I have worked out the ionic equation... 2 MnO4- + 16 H+ + 10I- --> 2Mn2+ + 8H2O + 5I2- How to write the full equation?? THanks

Other than this website, any others??

This website i have read before! I want some exam type questions actually in order to practise my skills!

It seems that you have read a lot! Can you give me some questions

actually i want some more concrete calculations I have read 100 pages before. But the websites i found are not suitable enough.

Actually, what is redox titration? what are the steps of carrying out this typpe of titration? Is it just like the simple titration?? Can anyone kindly list out a few examples, i mean calculations about redox titration? I am thankful if anyone can help.