Chemistry - March 2007

2007-03-11 14:19:07 · 2 answers · asked by meann m 1

Please state the word equation and some ideal points about the chemicle reaction. I also would like to know what new products are also produced

2007-03-11 14:12:35 · 3 answers · asked by chizee 1

KMnO4 changes its oxidation state. and within this equation, is an oxidation reduction, or a redox reaction. all i know is that the oxidation states of the elements change. the equation is:
KMnO4 + NaHSO3 ->
Potassium Permanganate + Sodium Hydrogen Sulfite ->

2007-03-11 14:04:04 · 1 answers · asked by dubbLe x 2

ring-CH2-OH + CH3COOLi----------------->

the ring is 6 ring with a circle (3 double bond)

2007-03-11 14:04:01 · 1 answers · asked by John 2

A solution is 0.0100 M in each of the metal ions in the table. HCl is added to the solution such the H30^+ concentration is 0.300 M. H2S gas is bubbled through the solution to attain a H2S concentration of 0.100 M. Predict which of the sulfides precipitate under the given conditions.

Metal-------Sulfide Kspa
FeS---------- 6 x 10^2
NiS----------- 8 x 10^-1
PbS---------- 3 x 10^-7
CuS---------- 6 x 10^-16

Which ones will precipitate?

2007-03-11 14:01:19 · 2 answers · asked by Anonymous

why do we need so many enzymes?

2007-03-11 13:51:58 · 2 answers · asked by nancy joy m 1

1. Dissolve three grams of powdered copper (II) sulfate in 20 ml of distilled water in a beaker.
2. Place a strip of zinc metal in the water. Wait at least 15 minutes for a reaction to occur.
3. Observe and record what happens to the zinc.
4. Write the equation for the reaction; identify the type of reaction.

What type of reaction is this? Is this an exothermic reaction or endothermic reaction?

2007-03-11 13:42:12 · 2 answers · asked by mz. * 1

2007-03-11 13:38:46 · 4 answers · asked by viktoria y 1

2007-03-11 13:37:27 · 2 answers · asked by newyorkgirl 2

2007-03-11 13:35:12 · 2 answers · asked by stacy n 1

2007-03-11 13:23:20 · 2 answers · asked by Anonymous

2007-03-11 13:19:09 · 1 answers · asked by Anonymous

solidification, crystalllization, sublimation, or condenstation?

2007-03-11 13:13:56 · 6 answers · asked by Krystal 2

I think the answers were sp3 and sp3d2, but they were wrong. help please!!

2007-03-11 13:11:34 · 4 answers · asked by Anonymous

2007-03-11 13:06:37 · 2 answers · asked by Anonymous

Liquid methanol (CH3OH) is used as an alternative fuel in truck engines. An industrial method for preparing it uses the catalytic hydrogenation of carbon monoxide.
CO(g) + 2 H2(g) ====> CH3OH(l)

How much heat (in kJ) is released when 10.4 L of CO at 85C and 183 kPa reacts with 17.5 L of H2 at 75C and 768 torr?

2007-03-11 12:59:36 · 1 answers · asked by pinay804 2

FeS2 + Na2O2 --> Fe2O3 + Na2SO4 + Na2O

Bi(NO3)3 + Al + NaOH--> Bi+ NH3+ NaAlO2

2007-03-11 12:52:08 · 3 answers · asked by jpschule 2

chemical change and biological change

2007-03-11 12:50:27 · 3 answers · asked by Dany H 1

I need to know what metal has a Specific Heat Capacity of .386 or very close to that.

2007-03-11 12:45:25 · 5 answers · asked by shorty 1

Account for each of the following observations abotu pairs of substances in your answers, uses appropriate principles of chemical bonding and or intermolecular forces. In each part, your answers must include references to both substances.

a.) Even though NH3 and CH4 have similar molecular masses, NH3 has a uch higher normal boiling point(-33 degrees C) than CH4 (-164 degrees C)

b. At 25 degrees C and 1.0 atm, ethane (C2H6) is a gas and hexane (C6H14) is a liquid.

c. Si melts at a much higher temperature (1410 degrees C) than Cl2 (-101 degrees C)

d. the melting point of NaF is 993 degrees C, whereas the melting point of CsCl is 645 degrees C/

2007-03-11 12:26:14 · 3 answers · asked by XoswimXo 1

2007-03-11 12:20:24 · 3 answers · asked by sikhism4life88 1

2007-03-11 12:18:12 · 3 answers · asked by givmemymoney 1

theory of calculating the percentage of iron in iron tablets

2007-03-11 12:11:56 · 2 answers · asked by Anonymous

Calculate [ H + ] of a 0.290 M solution of Pyridine C5H5N Kb = 1.70e-9

2007-03-11 12:00:26 · 1 answers · asked by Anonymous

which of the following statements are true?


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

b) For an acid H-A : the stronger 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

2007-03-11 11:59:45 · 2 answers · asked by Anonymous

What is [ OH - ] for a solution where pH = 8.60?

2007-03-11 11:59:11 · 2 answers · asked by Anonymous

I'll choose the best answer ASAP.

2007-03-11 11:56:52 · 1 answers · asked by ? 2

2007-03-11 11:52:26 · 2 answers · asked by SylverC 1

2007-03-11 11:51:35 · 2 answers · asked by Anonymous

In an experiment of Titration of acids and bases, the molarity of a monoprotic acid was determined, how would the experiment change if it was a polyprotic acid used?

2007-03-11 11:51:14 · 1 answers · asked by atlien2008 1