Chemistry

Restriction Enzyme Question

1. Which of the following base sequences would probably not be recognition sites for cleavage by restriction endonucleases? Why not? A. 5’ GAATTC 3’ B. 5’ CATTAG 3’ C. 5’ CATATG 3’ D. 5’ CAATTG 3’ The

How could you isolate the R-(+)-alpha-phenylethylamine

How could you isolate the R-(+)-alpha-phenylethylamine from the mother liquor? The mother liquor consists of (L)-(+)-tartaric acid + alpha-phenylethylamine-acid

PLEASE I'VE TRIED EVERYTHING

A solution is made by mixing 16.0g of Sr(OH)2 and 45.0mL of 0.250M HNO3. WHAT IS THE CONCENTRATION OF OH-. I was able to find all the concentrations EXCEPT THAT. i KEEP GETTING 5.84 nd it keeps tellin

What's this piece of science equipment called

So I did this science experiment and now Im writing a report but I forgot what one of thee pieces of equipment is called... So its like a white ceramic tray with 12 holes in it to put chemicals and

What is the best way to find out what a substance is

I have a white powder and do not know what it is... i added it to some HCL and it gave of CO2...... how do i get the first part of the formulae?-The production of CO2 indicates the presence of a carbo

What is the hottest color of fire

I was wondering what was the hottest color of fire. I know blue is hotter than red. Would violet be the hottest because violet has the shortest wavelength on the visible light spectrum? ...Does wavele

Caculate the mole ratio od A- : HA needed to produce an acetate buffer of pH=5

HA or buffer equation is: pH=pKa+Log(ratio) pKa of acetic acid is 4.792 (from wikipedia) 10^(5/4.792) = ratio 11.0511... to 2 sig figs 11

How many significant digits are there

In... 7.6 x 10^3 7.60 x 10^3 7.600 x 10^3 And why?-7.6 x 10^3 - 2 7.60 x 10^3 - 3 7.600 x 10^3 - 4-Try this for the why: http://misterguch.brinkster.net/sigfigs.…

Heat of Combustion of Alcohols

1-propanol, 1-butanol, 1-pentanol, 1-hexanol. What are the literature/ published values of their heats of combustion in kJ/mol. Please provide a source. Thanks !-Here are the exact datas: 1-propano

Simple chemistry question using gas laws

How many moles of KClO3 at STP will be needed to produce 22.4 L of O2 gas according to the following equation: 2KClO3(s) => 2KCl(s) + 3O2(g) The answer is .67 but I am not sure how to get it. I trie

Q= mcΔT and q=cΔT difference

When do you use both the equations? i believe one c is specific heat, and the other is heat capacity? can someone please explain these for me? thanks!-The Q = CΔT is used when calculating heats using

What is the number of sublevels equal to for each energy level

i know that the number of sublevels is equal to the principal energy levels but i dont really understand what this question is asking.-Assuming you mean SUBSHELLS, then the number of subshells of a pr

IUPAC Name Questions

Could you help me out with the IUPAC name? Im trying to study for the exam and I need help... Thank you! Diagrams - http://dl.dropbox.com/u/43732846/chem.jpg-1. 3-Bromopentane 2. 4-Methylcyclohexan

How would you write the equilibrium constant

Fe^3++6SCN^-=[Fe(SCN)6]^3- Kc=?-Kc = [Fe(SCN)6] 3- / [Fe 3+][SCN-]^6

What does pH = -log[H+] mean

i know thats what the pH is.. but i need more detail about this equation?-This is simply the graph that models pH, the log function is the inverse of an exponential function. The [H+] which is also k