Chemistry - March 2007

formula of this hydrated salt. show work.

2007-03-14 20:22:13 · 2 answers · asked by darkraven_222000 1

Since an ion is surrounded by many others to hold it together and vice versa, how does it end? in a sphere.. square or what?
Which force is dominant to end the structure?

2007-03-14 20:17:57 · 1 answers · asked by sindy 2

2007-03-14 20:00:37 · 1 answers · asked by goodguy20000 S 1

2007-03-14 19:50:26 · 1 answers · asked by mohdfakhriomar 1

2007-03-14 19:48:09 · 4 answers · asked by liven21 1

If so, what is the type of reaction that takes place that turns fat into soap? What type of soap is produced? And what do the wood chips do?

2007-03-14 19:45:39 · 1 answers · asked by kd0284 2

2007-03-14 19:03:46 · 1 answers · asked by Simple gurl 4

2007-03-14 18:57:20 · 1 answers · asked by cudaa 1

What is an optically pure triglyceride that provides two equivalents of pentanoic acid and one equivalent of butanoic acid after the KOH saponification of trimyristin to isolate myristic acid?? I don't even know how to begin to answer this question and would really appreciate any help!! Thank you!

2007-03-14 18:48:38 · 1 answers · asked by Anonymous

2007-03-14 18:44:47 · 2 answers · asked by hello 2

can someone help me write the net ionic equaltion for :

silver nitrate + potassium thiocyante

thanks so much!

2007-03-14 18:11:13 · 1 answers · asked by tracyle2686 3

What volume of 0.0500M sodium hydroxide should be added to 250.mL of 0.100M HCOOH to obtain a solution with a pH of 4.50? (Ka(HCOOH)=1.7X10-4)

Possible answers:
A. 540mL
B. 420mL
C. 80mL
D. 340mL
E. 500mL

2007-03-14 18:01:55 · 1 answers · asked by kevin_dilley 1

A sample with an unknown compound witha mass of 2.876g has the following coposition:66.07 percent carbon, 6.71 percent hydrogen, 4.06 percent nitrogen, and 23.16 percent oxygen. what is the mass of each element in this compound?

2007-03-14 17:38:15 · 2 answers · asked by latrice7437 2

This would be a real challenge.

2007-03-14 17:27:22 · 1 answers · asked by heinsight 1

2007-03-14 17:18:29 · 3 answers · asked by historyman 1

2007-03-14 17:13:32 · 4 answers · asked by historyman 1

2007-03-14 17:00:12 · 10 answers · asked by Monica S 1

how do you calculate concentrations of diluted solutions?
if you don't know this.. please tell me as much as you know on acid and bases

2007-03-14 16:48:58 · 4 answers · asked by Heell yeaah! 3

What is the (balanced) chemical equation for steel?

2007-03-14 16:36:00 · 3 answers · asked by stupid_fruitloop 1

true or false

2007-03-14 16:25:56 · 3 answers · asked by Anonymous

What is the pH of a 1.00 x 10–9 molar solution of HCl?

2007-03-14 16:19:30 · 5 answers · asked by Anonymous

1. what type of reaction is it when NaHCO3 (baking soda) and HC2H3O2 (vinegar) is combined? [I think it is double replacement reaction, but not sure.]
2. What is the product?
3. What is the balanced equation (with phase labels)
4. How do you read NaHCO3 and HC2H3O2 other than baking soda and vinegar? ( i think one of them was sodium bicarbonate or something like that)

2007-03-14 16:12:14 · 4 answers · asked by ?-? 1

2007-03-14 16:09:31 · 8 answers · asked by JR 2

what is the percentage compisition of a compound that contains 1.94g of carbon, 0.48g of hydrogen, and 2.58g of sulfur in a 5.00-g sample of the compound?

2007-03-14 16:03:52 · 3 answers · asked by latrice7437 2

2007-03-14 15:37:40 · 4 answers · asked by historyman 1

Draw the Lewis structures and determine which of these molecules has a central atom that violates the octet rule. Please note that NO3 has an odd number of electrons. But you must decide where the missing electron will be. Does the central atom violate the octet rule or do the oxygen atoms? Use formal charges to decide.

NO3
IF5
SO3
XeF2
CS2
BCl3
NH3
PCl3
SO2

2007-03-14 15:32:46 · 1 answers · asked by lola_boo 1

When copper (II) sulfate is combined with sodium hydroxide, what compound is formed?

2007-03-14 15:22:06 · 2 answers · asked by sillyboys_trucksare4girls 2

Charles's Law
1. A balloon is inflated with 6.22L of helium at a temperature of 36 degrees celsius. What is the volume of the balloon when the temperature is 22 degrees celsius.

Combined Gas Laws
2. A sample of ammonia gas occupies a volume of 1.58L at 22 degrees celsius and a pressure of 0.983 atm. What volume will the sample occupy at 1.00 atm and 0 degrees Celsius.

3. A student collects 285 mL of O2 gas at a temperature of 15 degrees celsius and a pressure of 99.3 kPa. The next days, the same sample occupies 292 mL at a temperature of 11 degrees celsius. What is the new pressure of the gas?

Avogadro's Principle
4. How many moles of acetylene(C2H2) gas occupy a volume of 3.25L at STP.

5. Determine the volume of 12.3g of formaldehyde gas(CH2O) at STP.

2007-03-14 15:12:57 · 4 answers · asked by ~SMCM101~NYC 2

2007-03-14 15:09:52 · 3 answers · asked by Didi 1

if two substances of different pH levels were combined, how would you calculate the final pH of the combination? example: a substance of pH 9, and a substance of pH 10, what is the final pH level?

2007-03-14 15:08:00 · 2 answers · asked by aznboardergirl 3