Chemistry - March 2007

2007-03-18 19:53:48 · 2 answers · asked by kevin 1

2007-03-18 19:52:35 · 6 answers · asked by kevin 1

2007-03-18 19:51:15 · 2 answers · asked by kevin 1

What enzymes are used when you burn glucose to get energy in aerobic respiration process?

2007-03-18 19:45:37 · 1 answers · asked by Anonymous

2007-03-18 19:42:28 · 2 answers · asked by kevin 1

2007-03-18 19:38:34 · 5 answers · asked by Kevin 1

2007-03-18 19:36:59 · 1 answers · asked by Kevin 1

Just an example, I mainly need to know HOW to do it:

2Na ( ) + CLsquared ( ) = 2NaCl ( )

put aq, s, l, g in between paraenthesis

2007-03-18 18:45:29 · 3 answers · asked by Spaceman Spliff 3

was in a microwave does the microwave need to be replaced

2007-03-18 18:41:04 · 4 answers · asked by Socrates 3

This is also known as PERVERT. This relates all 3 ideal gas laws

2007-03-18 18:32:16 · 2 answers · asked by Bri 3

2007-03-18 18:25:03 · 4 answers · asked by Bri 3

MgSO4*7H20 ? And what is the molar mass of the MgS04 by itself? (anhydrous)

2007-03-18 18:20:51 · 3 answers · asked by ljkappas@sbcglobal.net 1

2007-03-18 18:18:08 · 1 answers · asked by Katrina H 1

2007-03-18 18:16:58 · 1 answers · asked by avalentin911 2

I am confused! Some text books state that Quartz is 100% covalently bonded;others state it is combination of ionic and covalent bonds. My understanding is it should be purely covalent as we are talking about Si-O bonds (both non metals, Ionic bonds involve metals and non metals). If Quartz is partly covalent and ionic then why does it display this behavour?
ANy help would be appreciated. Also is it true the impurites in quartz are only very small (such as Ti, Fe, or Al) and as such don't alter its chemical compostion?

2007-03-18 18:09:32 · 1 answers · asked by Gideon 1

What values are needed to find the heat capacity.??

thx for the help...

2007-03-18 18:09:08 · 3 answers · asked by Anonymous

2007-03-18 17:42:26 · 2 answers · asked by awherangi 1

DESCRIBE THE ENERGY TRANSFERS THAT OCCUR WHEN ICE MELTS AND WATER VAPOR CONDENSES TO FORM LIQUID WATER. PORTRAY EACH STATE OF MATTER AND THE CHANGE OF STATE USING A COMPUTER-DRAWING PROGRAM.

2007-03-18 17:33:09 · 2 answers · asked by Anonymous

2007-03-18 17:31:57 · 1 answers · asked by teck kim 2

I'm asking because there's a question asking:

how many moles of NaOH to add (NaOH is a strong base right?) to 1.0 L of 2.0 M HC3H5O2 (acetic acid) to have a pH of 1.8x10^-5. Also, pK(a) is 1.8x10^-5 ?

2007-03-18 17:31:34 · 3 answers · asked by Gc 1

2007-03-18 17:01:06 · 3 answers · asked by Anonymous

What is the Job of the Nucleus?

And give me a comparison of something similar..

For example [The Brain] It tell the body what to do

comparison: The president tell us wat to do

2007-03-18 16:43:03 · 5 answers · asked by bryanjuarez2004 1

How do you use the information you have for the equivalence point from a titration curve (pH vs. volume of NaOH added -the titrant) to calculate the unknown concentraton of NaOH?
You have the initial concentration of the acetic acid, as well as the volume. How do you determine the concentration of the NaOH used, from the equivalence point data which is a pH of 8.32 and a volume of NaOH of 25.19? Please Help!!

2007-03-18 16:33:25 · 2 answers · asked by Belle 3

You're studying gas laws (charles) and you put a flask into the freezer with a balloon attached to it. You put water into the flask after the freezer....and how would this affect the experiment

2007-03-18 16:21:33 · 2 answers · asked by Bri 3

I did the flame test lab in chemistry, and I am having a hard time with some of the questions. Any help will be greatly appreciated! :]

1.Is flame coloration a test for the metallic ion of for the nitrate ion?

2. Why do dry sodium chloride and the solutions of sodium nitrate and sodium chloride all impart the same color to the flame?

3.How would you characterize the flame test with respect to its sensitivity?

4.Several flame testes were shades of red. What should eb done in the lab to correctly identify one of these ions?

5.During a flood, the labels from 3 bottles of chemicals floated away. The unlabeled bottles of white solids were known to contain the following: strontium nitrate, ammonium carbonate, and potassium sulfate. Explain how you could easliy relabel these 3 bottles.

6. Decribe the activity of electrons when a substance is vaporized in a flame. What is viewed through a spectoscope and how does this intrument serve in identifying substances.

:]

2007-03-18 16:20:48 · 2 answers · asked by Quechyyy 2

2007-03-18 16:13:08 · 6 answers · asked by monse 2

++What is the molarity of a solution made by mixing 3.90 g of aluminum chloride with 100.0 g of water? (The density of the solution is 1.08 g/ml).


++A 350-ml sample of glucose solution has a concentration of 0.260 M. How many moles of glucose are in the solution?


++What is the molarity of 2.50 L of solution that contains 56.9 g of sodium sulfate?


++If 88.2 grams of sugar (C12H22O11) are dissolved in ethanol to make a 0.500 M solution, what is the volume of the solution?


++If 2.5 moles of CaCl2 are dissolved in 4.50 liters of solution, what is the concentration of each ion in the solution?

2007-03-18 16:05:19 · 5 answers · asked by Chanel 3

I have NO idea how to do these. Please help me!
Write and balance the following chemical equations...
1) Zinc reacts with iron (III) chloride yielding zinc chloride plus iron precipitate.
2) Ammonium carbonate and magnesium sulfate react to yield ammonium sulfate plus magnesium carbonate.
3)Phosphoric acid plus calcium hydroxide react forming solid calcium phosphate plus water.
4)Aluminum plus oxygen gas form aluminum oxide under certain conditions.
5) Nitrogen gas plus oxygen gas react and form dinitrogen pentoxide.
thank you soooo much!!!!!

2007-03-18 15:57:02 · 4 answers · asked by juicy 2

Since I set my buddy on fire in organic lab a few years back, I have safety in mind.

2007-03-18 15:52:23 · 3 answers · asked by Frederick 1

I need this for a science report, and wikipedia only has the percentage. I'm lousy at searching, and haven't found anything else. If you could give me some proof to your answer(i.e. a web address) Id appreaciate it.

2007-03-18 15:46:59 · 1 answers · asked by dart_richards 2