Chemistry - October 2006

2006-10-31 10:47:31 · 2 answers · asked by Huda H 2

a. NaCl and CH3CO2H
b. NH4Cl and HNO3
c. KCl and HCN
d. NaCH3CO2 and CH3CO2H
e. NaNO3 and HF

2006-10-31 10:44:26 · 2 answers · asked by Anonymous

a. 11.82
b. 10.04
c. 3.44
d. 2.18
e. 0.80

2006-10-31 10:43:56 · 1 answers · asked by Anonymous

For NH3, Kb = 1.8 x 10-5

a. 3.81
b. 4.74
c. 7.92
d. 9.25
e. 10.19

2006-10-31 10:42:42 · 1 answers · asked by Anonymous

a. CO2
b. CaO
c. Mg(OH)2
d. NaBr
e. NaCH3CO2

2006-10-31 10:41:28 · 5 answers · asked by Anonymous

2006-10-31 10:22:40 · 6 answers · asked by Anonymous

And evaluate how it disposes of solid wastes please!

2006-10-31 10:21:42 · 2 answers · asked by beeboroachgoingon197 1

oxalic acid is a compound used in cosmetics and paints. A 0.725-g sample of oxalic acid was found to contain 0.194g of carbon, 0.016g of hydrogen, and 0.516g of oxygen. If the molar mass of oxalic acid is 90.04g/ mol, what is the molecular formula?

2006-10-31 10:08:01 · 4 answers · asked by Anonymous

2006-10-31 10:04:33 · 1 answers · asked by Joyce 4

2006-10-31 10:02:01 · 1 answers · asked by Joyce 4

a form of phosphorus called red phosphorus is used to match heads. when 0.062g of red phosphorus burns, 0.142g of phosphorus oxide is formed. What is the empirical formula of this oxide?

2006-10-31 09:52:48 · 5 answers · asked by Anonymous

And how is this calculated?

2006-10-31 09:47:13 · 1 answers · asked by Anonymous

Hi everyone :),
I have one question in my chemistry assignment that's giving me hard time, if you know how to answer it, please reply. Here it is:
"Suggest the element (or group of the elements) that could be the central atom, X, in: X2S, nonlinear molecule."
My problem is how can you have 2 identical atoms as the central atoms in a molecule of 3 atoms! Shouldn't S (sulfur) be the central atom? Anyway, sulfur is not in this formual, but X is! So what element(s) could X be?

Please answer today! If not, then don't waste your time :)

Thanks in advance!

2006-10-31 09:26:33 · 1 answers · asked by F.L. 1

2006-10-31 09:25:36 · 6 answers · asked by Anonymous

there are two common oxides of sulfur. One contains 32g of sulfur for each 32g of oxygen. The other oxide contains 32g of sulfur for each 48g of oxygen. What are the empirical formulas for the two oxides?

2006-10-31 09:12:35 · 5 answers · asked by Anonymous

25cm3 of a solution of 0.1M NaOH reacts with 50 cm3 of a solution of hydrochloric acid. What is the molarity of the acid?

2006-10-31 08:54:19 · 4 answers · asked by Joyce 4

2006-10-31 08:52:54 · 6 answers · asked by emily h 1

25cm3 of sodium hydroxide react with 17cm3 of 0.1M of H2SO4.
Calculate the molarity of the sodium hydroxide.
The balanced equation is 2NaOH + H2SO4 ---->Na2SO4 + 2H2O.
so the ratio of the ............. NAOH to H2SO4 is 2:1 :D

2006-10-31 08:49:08 · 3 answers · asked by Joyce 4

I know it is sugar and chocolate, so i guess i am asking what the formula is for both of those.

2006-10-31 08:47:43 · 2 answers · asked by tenteus2000 1

im doing my science homework and really need an image of the collision theory, any website with images would be a help 2!!
thankyou

2006-10-31 08:44:59 · 6 answers · asked by hannah_detain 2

P = 664 torr
V = 959 mL
T = 30.5 oC


Enter a numeric answer only.

2006-10-31 08:41:31 · 1 answers · asked by simonkf2002 1

What is the balanced chemical equation for the reaction that occurs when HCl is added to Zn metal? And what is the chem equation when a lighted match comes in contact with the same reaction?

2006-10-31 08:39:05 · 2 answers · asked by Anonymous

2006-10-31 08:33:51 · 4 answers · asked by uno 1

What is the missing number in the following equations?

a.) 4NH^3 + 30^2 = 2n^2 + [ ?] H^2O
B.) 4NH^3 + 50^2 = 4NO + [ ?] H^2O
C.) 4FeS^2 + 110^2 = 2Fe^2O^3 + [?] SO^2
D.) 2HNO^3 + 3H^2S = 2NO + [?] H^2 = 3S

THANKS!

2006-10-31 08:30:41 · 5 answers · asked by Michelles W 1

2006-10-31 08:26:41 · 9 answers · asked by melycook 1

What is the balanced equation for when Aluminum reacts with sulfuric acid to give aluminum sulfate and gaseous hydrogen?

2006-10-31 08:25:08 · 4 answers · asked by Michelles W 1

V = 0.140 L

n = 0.191 mol

T = 30.5 oC


Enter a numeric answer only.

2006-10-31 08:14:05 · 2 answers · asked by simonkf2002 1

A] When resonably dilute HCl and AgNO3 solutions are mixed , a white AgCl precipitate forms, with some heat involved. When a Na2S2O3 solution is added to this reaction mixture, the white precipitate disappears upon stirring.

Is this possible... would you defend it or Refute it? Why?


B] Some chemist say that the AgCl in (A) dissolves. Others say that AgCl is prevented from precipotating further by the prescence of S2O3 (-2) ion.


Is this possible... would you defend it or Refute it? Why?

2006-10-31 08:13:01 · 1 answers · asked by Anonymous

constant pressure to a temperature of 87.0oC.
What is the final volume of this balloon, in liters?

Enter a numeric answer only.



oC = degrees Celcius

2006-10-31 08:06:49 · 2 answers · asked by simonkf2002 1

I bought a chain that looks and tests gold but was told its not real.Its marked 14k gold and tests like gold on an acid tester but its not real .Its also the same color as gold throughout the entire piece.Its not plated,the metal actually tests even if you file into it and it is a yellow/gold colored metal.

2006-10-31 08:01:59 · 1 answers · asked by Frankie D 1