Chemistry - March 2007

for instance:
which of the following pairs will give a precipitate when mixed?
A) AgNO3 and NaCH3COO
B)NaPO4 and Ca(ClO4)2
C)Ba(NO3)2 and NaCl
D)NH4Cl and Ca(Ch3COO)2

2007-03-03 04:00:43 · 3 answers · asked by Anonymous

I have seen alot of sites saying it is but then i saw like 2 that described it differently so im kind of second guessing myself.

2007-03-03 03:54:58 · 1 answers · asked by Anonymous

2007-03-03 03:44:28 · 2 answers · asked by nadimpally l 1

how many joules of energy can be extracted from a single grape?

2007-03-03 03:08:16 · 1 answers · asked by Zach 2

I need to have a experiment that will be able to determine the time it takes for diferent concentrations of H2O2 to decompose to oxygen

2007-03-03 03:06:56 · 2 answers · asked by Anonymous

2007-03-03 03:00:37 · 2 answers · asked by srena 2

2007-03-03 02:53:01 · 3 answers · asked by sci_hima 1

Why is silicon used in the production of solar cells?

2007-03-03 02:46:38 · 2 answers · asked by untilyoucamealong04 3

2007-03-03 02:46:20 · 1 answers · asked by aishwarya r 1

lets say C2H5OH and C3H7OH. how bout phenolic compunds? the same?

thanks alot!

2007-03-03 02:45:07 · 2 answers · asked by Aaron A 3

If K=47.6 for 4AB -> 2A2 + 4B, then for A2 + 2B -> 2AB, K=
a. 47.6
b. -0.145
c. 6.90
d. 2.63.
e. 0.145
f. 3.24

Now, the second equation is half of the first one and reversed. So I have taken half of 47.6 and obtained it's inverse which=.0420. I've done several other methods and I don't get any answer from above. Can anyone offer me some insight? Thanks.

2007-03-03 02:26:40 · 3 answers · asked by Adam C. from Italy 1

2007-03-03 02:04:04 · 6 answers · asked by Anonymous

slightly stuck again. firstly i need help to complete the equation and balance it and then i need to work out how many moles each reactant has. but i cant! please help.

2007-03-03 01:55:17 · 4 answers · asked by tomw91 2

The detailed answer gets the best point~
Please explain be specific
thanx

2007-03-03 01:36:27 · 9 answers · asked by Anonymous

for eg. co2---would combine in 3:8 ration but a carbon-14 would combine in 7:16 ratio

2007-03-03 01:18:31 · 1 answers · asked by prannayj 2

I seen this on the Discovery Channel show Mythbusters and i want to know if it is true.

2007-03-03 01:12:49 · 5 answers · asked by Mark L 1

Calculate the pH during the titration of 20.00 mL of 0.1000 M KOH with 0.1000 M HBr solution after the following additions of acid:
a) 0 mL?
b)10.00 mL?
im having problems with the steps so if you could show the steps that would be great!

2007-03-03 01:12:34 · 3 answers · asked by Anonymous

2007-03-03 00:55:18 · 6 answers · asked by AB 1

please could you show working so i can work out similar questions.

thanks

2007-03-03 00:09:30 · 2 answers · asked by tomw91 2

i need any gas law experiment(boyle's, dalton's, gay-lussac's,charles',ideal,combined,avogadro's) i don't need their definitions, i just need experiments explaining at least one of them. THANKS!!! :D

2007-03-02 23:57:44 · 3 answers · asked by gaslawexperiment 2

This is for a chemistry project, and i have been working hard at it; but all i have discovered are solvents for caffeine. If someone could give me a few (cheap) ideas, it would be most welcomed.

2007-03-02 23:25:33 · 2 answers · asked by gabrielwyl 3

Calculate the enthalpy change of the following reaction between nitrogen gas and oxygen gas, given thermochemical equations 1, 2 ,and 3 .

2N(2) + 5 0(2) ----->2H(2)0(5) AH = ?

1. 2H(2) + 0(2) ------>2H(2)0 AH = -572 kj/mol
2. N(2)0(5) + H(2)0 ---> 2HNO(3) AH = -77 kj/mol
3. 1/2 N(2) + 3/2 0(2) + 1/2 H(2) ---->HNO(3) AH = -174 kj/mol

Additional Details


Thanks for answering , and I follow u up to that point..I know what to do with equations #2 and #3 ... but I'm not sure what to do to equation #1 and why ?? How do i figure that out..I want to multiply it all by 5 , but this doesnt seem right ....help ! thanks

2007-03-02 23:03:45 · 1 answers · asked by Anonymous

2007-03-02 22:53:44 · 22 answers · asked by harri 1

2007-03-02 22:36:04 · 9 answers · asked by Anonymous

For our assignment...

2007-03-02 22:31:08 · 3 answers · asked by Floramae Celine B 1

Since ammonia turns red litmus blue, it must have alkaline properties.

Hence, why are ammonium salts (which should also have alkaline properties since ammonia does) reactive with alkalis to product ammonia etc.

2007-03-02 22:28:43 · 2 answers · asked by Chocolate Strawberries. 4

2007-03-02 22:08:27 · 6 answers · asked by Anonymous

is it nitrogen that the plants require to make proteins or the nitrate that is formed using bacteria in the soil and nitrogen?

If it is nitrogen, then why does the Haber Process go through the trouble of making it into ammonia?

2007-03-02 21:43:36 · 5 answers · asked by Chocolate Strawberries. 4

2007-03-02 20:35:28 · 1 answers · asked by sky_blue 1

TELL ME SCIENTIFICALLY

2007-03-02 20:32:57 · 0 answers · asked by kartik 2