Chemistry - November 2007

2007-11-26 17:53:59 · 2 answers · asked by Nancy E 2

2007-11-26 17:12:11 · 5 answers · asked by Anonymous

I'm trying to make gatorade using a mix. I want to make 2 quartz, but the instructions don't list 2 quartz. Help!!!

2007-11-26 16:26:41 · 4 answers · asked by Neziwi 3

hot H20 or cold H20 Freeze faster

2007-11-26 15:45:44 · 6 answers · asked by Julie W 1

Arrange the acids
I) phosphorous acid (H3PO3),
pKa1 = 2.00;
II) hydrogen selenate ion (HSeO-4 ),
pKa = 1.92;
III) selenous acid (H2SeO3), pKa = 2.46;
V) phosphoric acid (H3PO4), pKa = 2.12;
in increasing order of strengths.
1. Cannot be determined
2. IV, III, I, II
3. III, I, IV, II
4. IV, I, III, II
5. None of these
6. II, I, IV, III
7. III, IV, I, II
8. II, I, III, IV
9. II, IV, I, III
10. II, III, I, IV

2007-11-26 15:18:58 · 3 answers · asked by GinRum 1

There are at least 9 elements from the periodic table that in Latin translate into the names of certain colors or shades of color. This is due to the fact that these elements, when discovered were found in compounds that had these colors. what are the names of 4 of these elements, their Latin names, and which colors they represent?

2007-11-26 14:28:20 · 1 answers · asked by Anonymous

Can someone please help me in solving the following problems? You don't have to tell me the answer, but can someone guide me in getting the correct answer? I have notes on it, but they aren't very good ones. :[

1] Can you check if this is right -
N2 + 3H2 ---> 2NH3
How many grams of NH3 can be produced from the reaction of 28g of N2 and 25g of H2?
- Is it 1.99g NH3 & 74.25g NH3?
- And how do I found out how much of the excess reagent in that problem is left over?

ANNNDDD ... Mg + 2HCl ---> MgCL2 + H2
Is "What volume of hydrogen at STP is produced from the reaction of 50.0g of Mg and the equivalent of 75g of HCl?" a different format of the first question except w/ different numbers?

Mass-Mass

2KClO3 ---> 2KCl + 3O2
How many grams of potassium chloride are produced if 25g of potassium chlorate decompose?

Also, some questions use the word reaction instead of decompose; is that the same thing? Would I solve it the same as I would to the decompose ones?

2007-11-26 14:03:53 · 3 answers · asked by meh 2

Can you describe the manufacturing processes of plastic bag?
thank you very much!

2007-11-26 13:50:47 · 2 answers · asked by katon_cheng 1

its for a science experiment, i have to put the carbon dioxide in an aquarium and test it on plants. but i dont know how to put the CO2 in it... i guess i could breathe into it, but it would be hard work (lol). i'd use dry ice, but it would freeze the plants before i could test them... HELP!!!

2007-11-26 13:44:01 · 4 answers · asked by fsh 3

how can i determine the number of joules and calories a nut can contain for each gram of mass

2007-11-26 13:37:51 · 3 answers · asked by Anonymous

2007-11-26 13:31:53 · 1 answers · asked by abuloy89 1

Why is radon so bad for you?

2007-11-26 13:31:16 · 7 answers · asked by Rando B 2

What volume (mL) of 0.420 M potassium hydroxide solution would just neutralize 49.0 ml of 0.291 M H2SO4 solution?

2007-11-26 13:28:20 · 1 answers · asked by starrynight4592 1

2007-11-26 13:27:03 · 2 answers · asked by Chels 1

If I add a small piece of liver in a tube of 3 types of pH, what are the products of my reaction?
more specifically, what type of gas is it giving off?

2007-11-26 13:20:03 · 4 answers · asked by exxohh<3 1

2007-11-26 13:04:58 · 1 answers · asked by Anonymous

I am looking for a technical chemical sounding name for pure unadulterated drinking water.

2007-11-26 13:03:43 · 7 answers · asked by Roland B 1

Metallic magnesium reacts w/ water to produce magnesium hydroxide and hydrogen gas; if you have 16.2 g of magnesium and 12.0 g of H2O, how many moles of the excess reactant are left?

2007-11-26 13:03:11 · 3 answers · asked by Caramel 2

1. devise a measure of solute concentration that you would place on the label for the following case: you weigh out 2.56g of zinc iodide. you put the solid zinc iodide in a 500mL flask and fill the flask with water to the 500mL mark. you now have 500mL of a zinc iodide queous solution. on the label of the flask you write (there can be many different possibilities)

2007-11-26 12:59:22 · 1 answers · asked by Neha G 1

2007-11-26 12:55:34 · 5 answers · asked by Alfonso G 1

which prefix indicates each of the following numbers of atoms in a molecular compound formula?
a. 3
b. 1
c. 2
d. 6
e. 5
f. 4

2007-11-26 12:42:28 · 2 answers · asked by Anonymous

2007-11-26 12:42:15 · 2 answers · asked by drain_bamaged 2

If water becomes water vapor at 100 degrees C, and is liquid water at any lower temperature, than how does water vapor stay as water vapor when it's at room temperature, wouldn't it be constantly condensing? Does this make any sense?

2007-11-26 12:41:16 · 4 answers · asked by Hector 2

2007-11-26 12:37:32 · 4 answers · asked by christy z 1

what chemical equation defining the reaction between magnesium and hydrochloric acid. Including the products and the gas it makes

2007-11-26 12:35:21 · 3 answers · asked by Anonymous

I know how to find the element... but I'm confused as to how you find the EC of a compound. Do you add them together? Add the electrons first?

Our teacher sent us home to do this without explaining how and we're all lost! So on behalf of about 15 students, thanks!

2007-11-26 12:27:58 · 3 answers · asked by ChaChaChingThing 2

How do i find:
the number of protons, neutrons, electrons and the charge of the element

thanks!!

2007-11-26 12:20:15 · 1 answers · asked by JulyFire 5

2007-11-26 12:19:05 · 1 answers · asked by Anonymous

2007-11-26 11:43:04 · 1 answers · asked by Dana C 1

There is no way to show optical isomerism using basic structural formula models is there? I mean the most basic structural formulas that do not show the four groups in their actual positions in space.

2007-11-26 11:14:54 · 1 answers · asked by bill b 1