Chemistry - December 2007

a) primary haloalkanes give nucleophilic substitution via SN2 mechanism.
b) Tertiary haloalkanes give nucleophilic substitution via SN1 mechanism.
c) The rate of SN1 reactions depends only on the concentration of the nucleophile.
d) SN1 reaction is not stereospecific and if the starting material is a chiral compound the product is a racemic due to the planarity of th carbocation intermediate.
e) SN1 reactions are stereospecific with inversion of configuration.

2007-12-29 02:30:02 · 3 answers · asked by Anonymous

If I have a drug sample that contain impurities,what would be a simple laboratory method to determine the solubility of the pure form of the drug ?
I am seeking details of a method that uses solubilty phase diagram.

2007-12-29 02:28:51 · 1 answers · asked by reenigne 1

the internet defines sugar as carbohydrates that form white crystals, are formed by photosynthesis and are sweet. but i wanna know wht sugar is in terms of hydrocarbons... I mean, not all compunds containing carbon, oxygen and hydrogen are called sugar right(i guess?)? then wat kinds of hydrocarbons are classifed as sugar? in short, how do we distinguish sugar from other hydrocarbons?? thnks!

2007-12-29 02:06:48 · 5 answers · asked by Merry 3

2007-12-29 00:18:29 · 5 answers · asked by Natasha 2

2007-12-28 23:58:38 · 4 answers · asked by padmesh v 1

Everyone know you can extract some metals with carbon reduction from their oxide state. In this reaction, carbon would take the oxygen from the oxide and reduct the metal. But I don't understand why carbon can take the oxygen from the oxide. Why the bond in carbon dioxide is too strong? Also, can I use other elements to replace carbon? Like can I use silicon and form silicon oxide, or can I use some nitrogen compound with weak bond that can be break in low temperture and form nitrogen oxide?

2007-12-28 23:11:18 · 5 answers · asked by Anonymous

When put a magnesium into steam, magnesium oxide is formed. When you add a potassium into water, potassium displace the hydrogen in water molecule and form potassium hydroxide + hydrogen. Why the hydrogen in the hydroxide ion would not be displaced by potassium? Calcium in group II form hydroxide ion in water too. Why?

2007-12-28 23:00:31 · 2 answers · asked by Anonymous

pLEASE PROVIDE LINKS AND INFO OR JUST NAME TOPICS.THIS IS HOLIDAY HOMEWORK.THANKS IN ADVANCE!!!

2007-12-28 22:16:05 · 2 answers · asked by Anonymous

How and where is this done?

2007-12-28 22:05:21 · 2 answers · asked by Mia S 1

2007-12-28 20:17:03 · 3 answers · asked by SANJAY R 1

I have got a curiosity whether mercury can melt gold. Can any one confirm my doubt?

2007-12-28 20:03:55 · 5 answers · asked by Madasamy 1

what are the top 5 best chemistry tricks? pls help me...

2007-12-28 19:29:24 · 2 answers · asked by jekena 1

I need help with this one problem
I don't just need the answer I help to figure out how to solve it step by step it would help me soooo much

5.0 grams magnesium metal is dropped into a solution of silver nitrate, forming silver metal and magnesium nitrate. How many grams of magnesium nitrate is formed?

I got this for my balanced equation: Mg+2 AgNO3---> 2Ag+Mg(NO3)2 is this a good place to start and if it is, where do I go from here?

Your help is apperciated!

2007-12-28 17:53:43 · 2 answers · asked by Anonymous

2007-12-28 17:42:53 · 3 answers · asked by Anonymous

Could Kryptonite really kill Superman? Explain why or why not.

2007-12-28 17:25:51 · 9 answers · asked by Anonymous

Anyone know any chemistry labs , which they have done in the past in their chemistry class?

2007-12-28 15:50:18 · 4 answers · asked by βεαuτy ♥ 4

exactly the same\/

2007-12-28 13:49:01 · 4 answers · asked by Lester Adam D 1

what's the quickest ways to get a container of water to evaporate? should i put it by a bright light or outside? i don't want the water to freeze if i put it outside.

2007-12-28 13:47:15 · 6 answers · asked by four_eyed_bandgeek 1

2007-12-28 13:41:11 · 6 answers · asked by J T 6

1. 0%
2. 25%
3. 50%
4. 100%

2007-12-28 12:29:22 · 3 answers · asked by Anonymous

The element indium has an atomic mass of 114.8 g and an atomic number of 49. Naturally occurring
indium contains a mixture of indium-112 and indium-115, respectively, in an atomic ratio of
approximately

(a) 6/94 (b) 25/75 (c) 50/50 (d) 75/25 (e) 94/6

2007-12-28 11:58:06 · 2 answers · asked by tmlfan 4

A)CaO
B)Al2O3
C)Li2O
D)CO

2007-12-28 11:52:12 · 1 answers · asked by Anonymous

A) trigonal planar
B) T-shaped
C) bent
D) tetrahedral
E) trigonal Pyramidal

2007-12-28 11:49:51 · 4 answers · asked by Anonymous

A) ionic solid
B) Network solid
C) metal
D) nonmetallic solid

2007-12-28 11:40:19 · 3 answers · asked by Anonymous

what does it mean when a baby has too much nitrogen in its kidneys

2007-12-28 11:35:32 · 1 answers · asked by italiaprincezza24 1

2007-12-28 11:19:53 · 6 answers · asked by Danielle B 1

I no that there r many different kinds of nylon..so could u say how to make nylon 6,6 and others if u no it..?

2007-12-28 08:24:22 · 8 answers · asked by laze-butt 3

2007-12-28 06:48:48 · 2 answers · asked by Chica_2 1

Are carbohydrates and alcohols related at all? since carbohydrates have -OH groups, which is an alcohol functional group. Is CH3OH an alcohol? if so how do you name it? n-methylnol?

2007-12-28 06:41:01 · 3 answers · asked by Yida G 1

3. The atomic number of an element whose atoms have 9 electrons and 10 neutrons is ? 4.One isotope of carbon has 6 protons and 6 neutrons. The number of protons and neutrons of a second isotope of carbon would be ? 10. A certain element is a gas and dose not conduct electricity or heat. Which of the followin is a possible number of valence electrons for the atoms of this element? is it A. 1, B.2,C.3,OR D.6 11.Based on its position in the periodic table, the most likely charge of an iodide ion is A.1+, B.1-,C.2+or D.7-

2007-12-28 06:32:55 · 2 answers · asked by sindiercanales 1