Chemistry - July 2007

the suitable total ppm of drinking water

2007-07-12 12:27:43 · 4 answers · asked by Anonymous

Is their something bad to do with sodium fluoride? If so, what?

2007-07-12 11:18:05 · 4 answers · asked by AShortStoryInThirtyTwoCharacters 1

another name for a metal oxide is an acidic oxide.

litmus is an example of a universal indicator

metals are found on the right side of the periodic table

neutrilization produces water and a base

stomach acids contains sulfiric acid.

neutrilization involves the reaction of hydrogen and oxide ions

metals oxides react with oxygen to produce bases

baking soda is an example of a common acid
.

2007-07-12 10:22:48 · 3 answers · asked by Anonymous

2007-07-12 10:04:40 · 4 answers · asked by shivahonu 1

like does a apple taste to you like it taste to me???

2007-07-12 09:39:13 · 5 answers · asked by STORMY K 3

name the produt and type reaction for in eact case ?????

thanx :)

2007-07-12 08:42:22 · 2 answers · asked by DODO 1

also what does (triangle) H mean?


and Rocket Fuel is rated as energy per weight of fuel. Which would be better rocket fuel H2, gasoline, or glucose.

2007-07-12 08:40:27 · 4 answers · asked by Ritha 1

I think if there's anything useful to memorize, it is the periodic table. I'd like to be able to talk about elements which are Alkalis · Alkaline earths · Lanthanides · Actinides · Transition metals · Poor metals · Metalloids · Nonmetals · Halogens · Noble gases. Any clues how to go to about it? I tried making Mnemonics but then I can't come up with words that make sense make pertain to the periodic table.
I'd love to be a nerd about Chemistry and not have to look up the table to solve problems.

2007-07-12 08:27:51 · 8 answers · asked by Eva Selena 2

2007-07-12 08:22:59 · 5 answers · asked by Stephanie K 1

in the sense of analysis. Which instruments can be utilized?

2007-07-12 07:37:03 · 3 answers · asked by Ann 1

aslo explain whether or not a stopper should be inserted in the top of a refulx condeser

2007-07-12 07:23:09 · 6 answers · asked by DODO 1

calculate the theoretical yeild of the product
1-(4-methoxyphenyl)-2-methylpropan-1-ol

180.21 g/mol


2-bromopropate 1.48 g
molar mass 123.0 g/mol

4-methoxybenzaldehyde 0.68g
molar mass 136.15 g/mol

2007-07-12 07:13:24 · 2 answers · asked by sippy85 1

write the ractions of methylmagnesium iodide with the following aldehydes and ketones. Assume that all reactions include a hydrolysis in aqueous acid.

A)formaldehyde (methanal) CH2O
b) acetone
C) cyclohexanone

2007-07-12 07:10:28 · 1 answers · asked by goofy 2

write chemical reactions for the formation of the respective Grignard reagents from the raction of Magnesium with the following organic halides.


A) iodomethane

B) bromobenzene

C)chlorocyclohexane

2007-07-12 07:07:37 · 1 answers · asked by goofy 2

2007-07-12 06:37:36 · 12 answers · asked by Anonymous

i know that the percentage of acetic acid is computed as the volume of soduim hydroxide times its normality equals the number of milligram equivalents of acetic acid neutrilized. The equivalence of acetic acid is 60.0mg or .060g. the 10mL sample of vinegar weights 10.05g. and the volume of sodium hydroxide is 12.54 mL. So how can i calculate the percentage of acetic acid? also i know that vinegar is essentialy a dilute solutin of acetic acid in water, and the law requires that vinegar be at least 4% acetic acid by weight.

2007-07-12 06:36:38 · 6 answers · asked by ... 3

i.e., wat is d no. 12

2007-07-12 06:34:52 · 10 answers · asked by Anonymous

2007-07-12 06:22:01 · 4 answers · asked by DODO 1

How will you know that the thermometer shows the boiling point?

Select the best explanation from those shown.

a. Wait until the thermometer shows the literature boiling point.
b. Take a reading once the liquid starts to boil vigorously.
c. Take a reading when the thermometer displays a steady temperature.
d. Take a reading when the thermometer stops rising and remains steady.

2007-07-12 06:21:49 · 4 answers · asked by Anonymous

True or false? -- The following chemicals or reagents are toxic?

Bromine reagent
Dinitrophenylhydrazones
Chromic Acid reagent
Sodium Iodide / Acetone

2007-07-12 06:20:02 · 2 answers · asked by Anonymous

Chromic acid test would give a positive or a negative result for:

a. 1-Butanol
b. alpha-Pinene
c. 2-Butanol
d. 2-Methyl-2-propanol

2007-07-12 06:19:06 · 1 answers · asked by Anonymous

A chemistry student prepares the Tollens reagent by adding 1mL of aqueous silver nitrate solution and 1mL of 10% NaOH solution.
Then he adds 10mL of 10% ammonia solution and the precipitate dissolves.
After adding 3 drops of unknown, no silver mirror is formed.
What does that result indicate?

Select the best explanation from those shown.

a. To test properly, the solution would have to be heated.
b. A precipitate will NOT form if too much ammonia is added.
c. The wrong solutions were used to prepare the reagent.
d. The solution was prepared correctly and the unknown is NOT an aldehyde.

2007-07-12 06:18:09 · 2 answers · asked by Anonymous

2007-07-12 06:18:09 · 2 answers · asked by Anonymous

Is this a Unimolecular Rxn? 2NO-------->N2O2

Is this a Bimolecualr Rxn? N2O2 +H2-------->N2O+H2O

2007-07-12 06:10:26 · 3 answers · asked by mrkittypong 5

2007-07-12 06:07:32 · 3 answers · asked by Anonymous

Any edition would work

2007-07-12 06:07:24 · 2 answers · asked by Anonymous

2007-07-12 06:01:43 · 5 answers · asked by Aqua 2

2007-07-12 06:00:25 · 5 answers · asked by Aqua 2

Fe(NH4)2*6H20+H2C2O4= Fe(C2O4)*2H2O+(NH4)2SO4 + H2SO4+ H2O

2007-07-12 05:45:57 · 3 answers · asked by mrkittypong 5

A solution of hydrochloric acid is .9894 molar. When acid is used to titrate 25mL of a sodium hydroxide solution of unknown concentration to the phenolphthalein endpoint, 37.55mL of the acid are required. Calculate the molarity of the unknown sodium hydroxide solution?

2007-07-12 05:45:49 · 3 answers · asked by ... 3