Chemistry - January 2007

2007-01-29 23:44:00 · 3 answers · asked by -jAiVe- 1

does anyone know what the isomers of the following look like and what they are called?

C3H6Br2

C2H2Br2

CH3CH2CH(NH2)COOH

C4H8O

I tried to work them out but i'm really bad with figures. Please help. Thanks

2007-01-29 23:33:11 · 3 answers · asked by helenlouisewelsby 1

2007-01-29 23:14:57 · 6 answers · asked by gabY gRAPELInA 2

my working experience is of chemical engineer but i have degree of Physical chemistry. Can you provide chemical engineer degree

2007-01-29 22:30:09 · 3 answers · asked by Anonymous

Then what is the difference between evaporation of fuels and combustion?

2007-01-29 21:06:52 · 8 answers · asked by shockoshocko 3

We're learning about Smelling in chemistry. How do people smell odors with their noses?

2007-01-29 20:54:48 · 8 answers · asked by ANTHONY D 1

2007-01-29 20:49:17 · 3 answers · asked by kidmealem m 1

how can one differentiate and tell whether a compound is polar covalent or it is non polar covalent i need a detailed explanation please thanks

2007-01-29 20:44:26 · 5 answers · asked by blackcat XIII 5

when we perform redox titration for volumetric analysis,there are certain cases where the lower meniscus is observed to take the burette reading,in some upper meniscus is observed.what is the reason behind this difference?how important is it to take care of the meniscus which needs to be observed?

2007-01-29 20:42:12 · 4 answers · asked by Saniya 1

2007-01-29 19:32:59 · 2 answers · asked by JizZ E. Jizzy 2

A mixture of sodium oxide or sodium carbonate and calcium oxide or calcium carbonate work together to form soda-lime glass....?

2007-01-29 18:47:37 · 6 answers · asked by emikato_913 2

i was told that it was a liquid because it will after many many years will begin to sort of "drip"

2007-01-29 18:40:01 · 10 answers · asked by raul b 2

How many milliliters of .7M BaCl2 are needed to completely react with 280 ml of 0.5 M (NH4)2 CO3 ?

2007-01-29 18:39:32 · 1 answers · asked by Anonymous

2007-01-29 18:27:11 · 2 answers · asked by Anonymous

Im stuck with this prelab problem and I dont know what to do any help? or suggestions of what should I do ? Thanks

a.400 g sample of ascorbic acid is titrated with .10 M KIO3. The solution contains 5 ml of 1 M hcl and 1 g of KI(s). the iodate ion reacts with iodite I- , and H + to produce iodine and water.

IO3- +5 i- + 6H+ ---> 3 i2 + 3H2O
the ascorbic acid reacts immediately with the i2

when all the ascorbic acid has reacted an increase in the concentration of I2 and the reaction of I2 with I- to produce I3- signals the blue end point. triiodine I3- complexes with starch to produce the dark navy blue color.

I2 + I - -----> I3-

what volume of .10 M KIO3 is required to reach the end point.?

2007-01-29 18:20:59 · 1 answers · asked by Anonymous

2007-01-29 17:41:17 · 2 answers · asked by NEWTON PATI 1

i) CH3COOH(ka = 10-5) + NaHCO3 -><- CH3COONa + H2CO3(ka = 10-7)

ii) phenol(ka = 10-9) + NaHCO3 -><- C6H5ONa + H2CO3

Based on these calculations, can you suggest why NaHCO3 cannot be used in extracting phenols from organic mixtures?

part b) Phenols can be extracted into aqueous solutions with Na2CO3(ka of HCO3- = 10-10)

2007-01-29 17:33:42 · 1 answers · asked by Vaynthe 3

How many grams of Na are in 385 ml of a .75 M Na2CO3 solution??

2007-01-29 17:24:13 · 2 answers · asked by Anonymous

for eg. eriochrome black T is also called WDFA no 2 i think. but what does WDFA here stand for? where can i get more information about it? is it an industry-based colour index?

2007-01-29 17:11:49 · 1 answers · asked by confused seeker... 2

2007-01-29 17:11:22 · 3 answers · asked by Anonymous

What is the oxidation number of Sulfur in SO (sub3)(super 2-)?
I'm thinking there are 3 oxygens with a -2 charge, therefore we have -6 charge for oxygens which means a 6 charge for sulfur?
thanks in advance

2007-01-29 16:36:32 · 3 answers · asked by CrazyBirdMom 4

help me please, i have looked at every d*mn bottle in my entire house and only found one of the five products that i am supposed to for chem HW.. i need to find 5 products that contain an inorganic compound as a active ingredient. if you could, please list the name of the product and the chemical found in it. thanks so much!!!

2007-01-29 16:28:18 · 7 answers · asked by ☞danbighands☜ 3

2007-01-29 16:25:32 · 9 answers · asked by curly fries 1

its for my chem class...i really need a touch up on my conversion factors...

2007-01-29 16:04:14 · 10 answers · asked by xXUntouchableXx 3

and what is the equation of the combustion of the fart?

2007-01-29 16:03:21 · 3 answers · asked by Josh D 1

What would be necessary to cause ammonia to react with hydrogen peroxide to produce nitrous oxide and hydrogen?
4(NH3)+(H2O2)=2(N2O)+7(H2)
Is there some sort of catylyst, or a specific temperature, or a certain pressure or level of purity that needs to be attained for this reaction to take place? If so, please respond. Your help would be greatly appreciated.

2007-01-29 16:02:48 · 1 answers · asked by Anonymous

Calculate the osmotic pressure at 25°C of an aqueous solution of 1.00 g/L of a protein having molar mass=4.15×104 g/mol.




Calculate the freezing point depression of the above solution, if the density of the solution is 1.00 g/cm3. (units can be either "K" or "degC")

2007-01-29 15:52:54 · 2 answers · asked by Anonymous

If someone could verify that I'm on track with the following, I'd be very grateful.

ferrous nitrate Fe(NO3)2
ferric nitrate Fe (NO3)3
and the numbers should be subscripts.
thanks in advance

2007-01-29 15:43:46 · 3 answers · asked by CrazyBirdMom 4

One atom of 18O has a mass that is 1.50 times higher that of a 12C atom. What is the atomic mass of this isotope of oxygen expressed in atomic units?

2007-01-29 15:36:01 · 2 answers · asked by dimo_e7 2

soln saturated w/ PbS04 @ 50C (ksp 2.3x10^-8) what mass will precipitate from 815ml when cooled to 25c? The ksp for 25 deg. C is ( 1.6 x 10^-8) I'm a bit confused as where to start, can anyone give me an idea?

2007-01-29 15:34:31 · 1 answers · asked by biologynut1 1