Chemistry - March 2007

2007-03-09 03:42:46 · 6 answers · asked by Hiborn 1

which of the following statements are true?


a) For an acid H-A : the greater the electronegativity of A, the weaker the acid HA

b) For an acid H-A : the weaker the H-A bond, the stronger the acid H-A

c) HBr is a stronger acid than HF

d) H2SO3 is a weaker acid than H2SO4

e) HIO is a stronger acid than HBrO

f) For carboxylic acids : the greater the electronegativities of the atoms in the group bonded to the carboxyl group, the stronger the acid

2007-03-09 03:41:09 · 1 answers · asked by Foxychick 1

Is it acidic enough to react with NaOH? i have it in solid form, dissolved in dichloromethane and i wanna separate it out. Can i just react it with base to form an aqueous layer, or would it not react totally with naoh?

2007-03-09 03:40:54 · 2 answers · asked by akaiyubi 2

2007-03-09 03:36:33 · 2 answers · asked by Chocolate Strawberries. 4

do u have to add up C 6 H 12 O 6 which equals 64.0648
then i dont know

2007-03-09 03:35:02 · 4 answers · asked by Anonymous

which of the following statements are true?


a) For an acid H-A : the greater the electronegativity of A, the weaker the acid HA

b) For an acid H-A : the weaker the H-A bond, the stronger the acid H-A

c) HBr is a stronger acid than HF

d) H2SO3 is a weaker acid than H2SO4

e) HBrO is a stronger acid than HClO

f) For carboxylic acids : the greater the electronegativities of the atoms in the group bonded to the carboxyl group, the stronger the acid

2007-03-09 03:10:47 · 1 answers · asked by Nick J. C 1

1. What is chlorine commericially made from?

2. If moist litmus paper is placed in chlorine gas, what color does blue litmus paper turn into?

3. When hydrogen burns in chlorine, what is the product formula?

thanks !

2007-03-09 03:10:13 · 3 answers · asked by frickenawesomekoreanandyouknowit 2

how are the steps?

2007-03-09 02:58:01 · 1 answers · asked by Anonymous

Barium sulfate, BaSO4 , is used in medical imaging of the gastro-intestinal tract because it is opaque to x-rays. A barium sulfate solution is ingested by patients, whose stomach and intestines can then be visualized via x-ray imaging.

The Ksp of BaSO4 is 1.1 * 10^-10

2007-03-09 02:57:19 · 2 answers · asked by Chelsea H 1

melts at 217K and is a gas at room temperature

2007-03-09 02:50:09 · 2 answers · asked by jumpy789 1

since methanol has the lowest molar mass I do understand that it is the alcohol that evaporates easier than say ethanol or propanol. Our body temperature never exceeds 40 degrees celsius. yet they say that it is the vapor that causes the nausea and blindness. I dont see how methanol can go from liquid to vapor. PLEASE HELP ME

2007-03-09 02:49:32 · 3 answers · asked by avalentin911 2

Im having trouble finding stereogenic centers in large molecules, does anyone have any tips or any good websites that might help?

I'm also having trouble determining if large molecules are Emantiomers, I can see what it looks like in my mind as a mirror image but I have no idea if it is superposable or not. Anyone have any tips or good websites with maybe some practice problems on it and answers?

Thanks!

2007-03-09 02:44:43 · 3 answers · asked by farxfromxlonelyx 1

the two end products of this equation are carbon dioxide (co2) and water. Whitch chemical or element will have the largest # of molecules in my balanced equation? A.the c3h B. the oxegen . the carbon dioxide D. the water

2007-03-09 02:41:59 · 2 answers · asked by SAM 1

My sister has her school project due, she needs to make crystals and she choose to make sulpher crystals, we have found some information but none of it is working, we do every step right and they still wont grow!!
Has anyone made them? and if so could you please give me some good guildlines to work with and how long it took to grow etc!?!?!

Thanks for your time!! =)

2007-03-09 02:38:13 · 1 answers · asked by xXx_AimZ_xXx 2

Na (s) + H_2O (l) yields ? My main thing is I can't figure out if sodium reacts with water to produce sodium hydroxide, and if it does do that I am having trouble balancing it. If it doesn't react does that mean that there is no reaction b/c i know since sodium is a solid it won't break up into its ions unless it reacts with an ion in aqueoues solution in the activity series. So any help will be greatly appreciated b/c as you can see i'm not so sure.

2007-03-09 02:31:49 · 4 answers · asked by me of course 2

I just wanna know.P.S.This is very important.

2007-03-09 02:30:48 · 8 answers · asked by Anonymous

a) NH3 and NH2-
b) HNO3 and CN -
c) NaF and F -
d) HI and I -
e) HNO3 and NO3-

2007-03-09 02:22:26 · 5 answers · asked by Foxychick 1

2007-03-09 02:21:25 · 1 answers · asked by Anonymous

I am wondering about the physics and or chemistry behind it

2007-03-09 02:19:21 · 2 answers · asked by JonathanPark 1

2007-03-09 02:15:41 · 1 answers · asked by i-sena 1

The two end products of this equation are carbon dioxide (co2) and water. I found the element that is first in balancing this equation, It is carbon,,, Now When you have finished balancing the equation number !, which chemical or element will have the largest number of molecules in your balanced equation?

2007-03-09 02:02:30 · 5 answers · asked by SAM 1

a) HBr and Br -
b) H3O+ and H2O
c) HCN and CN -
d) HClO4 and Cl -
e) KOH and OH -

2007-03-09 01:53:29 · 3 answers · asked by Gemini 2

i am a bit confuswd about which would be a better one

2007-03-09 01:48:49 · 3 answers · asked by Anonymous

A solution is prepared by adding 0.085 mol of K3[Fe(CN)6] to 0.52 L of 2.0 M NaCN. Assuming no volume change, calculate the concentrations of Fe(CN)63- and Fe3+ in this solution. The K (overall) for the formation of Fe(CN)63- is 1 1042.

2007-03-09 01:46:38 · 1 answers · asked by FaceFullofFashion 6

A solution is prepared by mixing 75.0 mL of 0.027 M BaCl2 and 115 mL of 0.040 M K2SO4. What are the concentrations of barium and sulfate ions in this solution? Assume only SO42- ions (no HSO4-) are present.

2007-03-09 01:43:39 · 2 answers · asked by FaceFullofFashion 6

how do i solve this question?

2007-03-09 01:42:01 · 6 answers · asked by Anonymous

2007-03-09 01:40:54 · 1 answers · asked by asphenry 1

monatomic ions - ions formed from a single atom.

2007-03-09 01:26:08 · 3 answers · asked by chuk_fi #11 1

I have been meaning to ask if anyone knows if distilled water is the best for us to drink. Basically, the purest. I read somewhere ( can't recall now ) that distilled water is the one we should be drinking. I am going to date myself here and say that I remember my mother only using distilled water in the iron, as she said it had something to do with keeping them from rusting. I buy distilled water to drink & some of my friends tell me that I am crazy to be drinking it.

2007-03-09 01:11:51 · 5 answers · asked by cola 5

2007-03-09 00:53:13 · 3 answers · asked by crickwiz 2