Chemistry - March 2007

2007-03-31 09:43:48 · 2 answers · asked by Michael 1

for example HCL we can name it hydrogen chloride or hydrochloric acid

which one is right . nd how do you if they want them to be name like an acid

2007-03-31 08:32:38 · 7 answers · asked by what ever ? 2

2007-03-31 07:31:49 · 4 answers · asked by Brunette Cutie 1

2007-03-31 07:12:46 · 11 answers · asked by jemlou81 1

why is butane a liquid in the lighter but a gas in the buret full of water?

2007-03-31 06:59:16 · 3 answers · asked by Djoanna Maria T 1

Can someone help me with this question please!!

In cars, ethylene glycol, C2H6O2, is used as a coolant and antifreeze. If a mechanic fills a radiator with 6.5 kg of ethylene glycol and 1.5 kg of water, what is the molality of the water?

2007-03-31 06:56:34 · 2 answers · asked by jeffrey a 1

2007-03-31 06:45:43 · 5 answers · asked by Andy S 2

I know that delta Tb = Kb m is supposed to be used, or at least I think it should be, but I don't know how to use it.
Anyways the question is....
Predict the boiling point of a 0.200m solution of Calcium phosphate in water.

2007-03-31 06:29:27 · 3 answers · asked by B.S. 1

A nitric acid solution is titrated with a standardized 0.0206 M. NaOH (aq) solution. If 17.86 mL of the NaOH solution was required to neutralize 25.00 mL of HNO3 (aq) what was the pH of the original nitric acid solution?

Do i start off by doing 17.86 * 0.0206/ (17.86 + 25) Where do i go from here?? i keep getting stuck.. thank you so much if any one can help even somewhat!

2007-03-31 06:20:29 · 3 answers · asked by Anonymous

2007-03-31 06:18:06 · 2 answers · asked by Anonymous

In synthesis, a symmetrical anhydride is necessary to create one product when you attack with a nucleophile on the carbonyl. e.g. R-C=OOC=OR. But you can only get 50% yield this way b/c you can only use half. Our teacher said that if you use a chloroformate to make something like: RC=OOC=OOR', that it would react with the carbonyl attached to R (not R'). Why won't it react with the carbonyl of the C=OOR' group? Does it have anything to do with the extra O attached?

2007-03-31 06:16:05 · 1 answers · asked by Anonymous

Green flames, red flames, and blue flames already exist. I think it would be cool to have a midnight black flame burst out of the torch lighter. but I need some help from chemistry majors who have an interest in fire.

2007-03-31 06:15:22 · 3 answers · asked by Dante Fire 1

be specific

2007-03-31 06:11:55 · 5 answers · asked by Anonymous

2007-03-31 06:09:42 · 20 answers · asked by Anonymous

2007-03-31 06:04:50 · 4 answers · asked by Alex L 1

CH2=CH-CH2-CH2-CH3 + Br-Br ----> ???

Please help

2007-03-31 06:02:25 · 3 answers · asked by Anonymous

2007-03-31 05:51:39 · 2 answers · asked by Anonymous

Which of the following are true statements about CO2 ?
a) The melting point of CO2 increases as pressure increases
b) The critical point of CO2 occurs at −57oC and 5 atm
c) At −20oC and 10 atm CO2 is in the gas state
d) At 20oC and 1 atm, solid CO2 will sublime
e) Above 31oC a pressure greater than 73 atm would condense CO2 to the liquid state

2007-03-31 05:44:30 · 1 answers · asked by Anonymous

the formula is m=zit

2007-03-31 05:41:15 · 1 answers · asked by guru s 1

2007-03-31 05:40:53 · 3 answers · asked by Anonymous

2007-03-31 05:24:01 · 2 answers · asked by Sgt. Pepper 2

Explain why a solid ionic compound does not conduct electricity, but the compound will do so when dissolved in water.

2007-03-31 05:18:14 · 4 answers · asked by Adley M 1

Element Z is a yellow solid that melts at about 100 degrees celcuis and does not conduct electricity. What type of bond hold the element's atoms together? Explain.

2007-03-31 05:15:33 · 2 answers · asked by Adley M 1

I know this much...

4NH3(g) + CuSO4(aq) ----> Cu(NH3)4SO4(?)

Is the product a solid or aqueous solution?

2007-03-31 05:14:42 · 2 answers · asked by Anonymous

2007-03-31 04:37:12 · 1 answers · asked by guru s 1

is n-butanol has sweet smell like ethanol does? I'm afraid that somehow it get mixed (ethanol and n-butanol). how can I check whether that n-butanol contaminated with ethanol or not?

2007-03-31 04:18:12 · 2 answers · asked by epiphany 1

The following reaction 2NO + H2 -> N2O + H2O goes to completion and is known to follow the rate law as shown below:
dP(N2O)/dt = k[P(NO)]^2[P(NO)]
The data in the following table is obtained:

run P(NO)o P(H2)o Half-life Temperature
(mm Hg) (mm Hg) (sec) (oC)
1 600 10 19.2 820
2 600 20 X 820
3 10 600 830 820
4 20 600 Y 820
5 600 10 10 840

(a) Insert the missing half-lives (X and Y) in the table above.
(b) Calculate k at 820oC in unit of (mm Hg)^-2 s^-1.

2007-03-31 04:17:27 · 3 answers · asked by sky_blue 1

followed by addition of excess phenylhydrazine can give crystal substances

2007-03-31 03:43:02 · 2 answers · asked by nadrosis 2

What is the value of the activation energy?

2007-03-31 03:24:38 · 2 answers · asked by crazzyangel16 1

a) 0.100 M HONH3Cl

b) A mixture containing 0.100 M HONH2 and 0.100 M HONH3Cl

Please help me in solving this problem. Thanx in advance.....

2007-03-31 02:19:13 · 3 answers · asked by Anonymous