Chemistry - December 2006

fire, water, carbon dioxide, methane, or oxygen?????

2006-12-20 13:32:00 · 4 answers · asked by jody w 1

To change a 10.0 M solution of sulfuric acid a 5.0M
solution, do I mix 25.0 ml of
the 10.0M with 25ml of water? Or what?

2006-12-20 13:11:05 · 3 answers · asked by Neodudeman 1

We did the typical magnesium in HCl experiment in school last week. For the post-lab questions its asks for the "literature" value of the molar volume of hydrogen. Its asks us to find the volume in the book (its not in there!). Does anyone know where I can find this, how to do this, or what it is? I got 8.3L/mol using my "experimental data." Not sure if thats correct.

thanks!

2006-12-20 13:06:19 · 3 answers · asked by countrygurl587 3

2006-12-20 13:01:45 · 7 answers · asked by Just 2

I have the equation 2Mg + O2 --> 2MgO.. how do I solve this???/

2006-12-20 12:46:52 · 4 answers · asked by jody w 1

as in chemistry

2006-12-20 12:45:34 · 8 answers · asked by Anonymous

During one of the worst hurricanes in the Western hemisphere, the air pressure dropped to 88.86kPa. what would the height of a column of mercury be at this pressure?

2006-12-20 12:43:02 · 1 answers · asked by Anonymous

need the answer within 5 days thank you... merry xams and a happy new year

2006-12-20 12:39:48 · 4 answers · asked by churva_char_chenes 1

Can someone explain polar covalent bonding to me?

2006-12-20 12:08:02 · 2 answers · asked by Molli 2

2006-12-20 11:59:10 · 3 answers · asked by eduardaberry 1

ok can you help me answer this science question?

the number of electrons each quantum can hold is the same as what?

2006-12-20 11:48:20 · 3 answers · asked by dane-y 1

help!!

2006-12-20 11:38:07 · 1 answers · asked by Kim L 1

does any one know what the atomic symbol for iron is?

2006-12-20 11:16:57 · 3 answers · asked by dane-y 1

what is the product of Anhydrous Copper(II)Sulfate + Water

2006-12-20 11:11:42 · 2 answers · asked by Anonymous

I need to calculate the theretical mass of solid product that should be produced:
NaHCO3+NaOH+CO2
How do i do this? Step by step plz.

2006-12-20 11:08:44 · 6 answers · asked by Anonymous

a. potassium hydride f. lead(II) nitrate
b. mercury(II) cyanide g. copper(II) perchlorate
c. zinc tartrate h. sodium tetraborate
d. cadmium silicate
e. ammonium dichromate

2006-12-20 11:05:19 · 6 answers · asked by San Fran Kid 2

2006-12-20 11:00:54 · 7 answers · asked by rock n' roll 1

a. silver and fluorine e. ammonium and oxalate ions
b. nickel (II) and sulfur f. strontium and iodine
c. chromium (III) and bromine g. lithium and oxygen
d. lead (II) and phosphate

2006-12-20 10:44:27 · 2 answers · asked by San Fran Kid 2

a. calcium chloride e. sodium fluoride
b. sodium cyanide f. aluminum nitrate
c. magnesium oxide g. zinc iodide
d. barium oxide h. cobalt (II) carbonate

2006-12-20 10:41:49 · 1 answers · asked by San Fran Kid 2

2006-12-20 10:34:52 · 2 answers · asked by Anonymous

I bought shrimp from supermarket, mince it up, add DI water, spin it down, remove the spuernatant and test the supernatant with Schiff reagent. The supernatant turn pink then purple. Is it because there is formaldehyde (or any aldehyde) in shrimp? or it is something else? Does any one know what chemical is used as preservative in seafood industries?

2006-12-20 10:32:07 · 3 answers · asked by ymidttt 1

2006-12-20 10:29:06 · 9 answers · asked by pentneypoacher 1

2006-12-20 10:25:53 · 3 answers · asked by Garte 2

need to prepare 250 mL of the solution.

50 mL of the buffer solution will need yo be able to absorb 0.1 moles of additional H+ or OH- ions without changing th pH by more than 0.01 units.

Must design a procedure for preparing and testing the buffer.

available chemicals
12M HCl
15M NH3
15M Hc2H3O2
NaOH(s)
NaC2H3O2(s)
NH4Cl
Distilled Water

2006-12-20 10:15:28 · 6 answers · asked by KTIZZLE 1

when i burn a magnesium strip what gas does it combine with?? oxygen?

2006-12-20 10:15:05 · 6 answers · asked by Anonymous

Some blue crystal (0.640g) with an emperical formular of C5H4 (64g/mol) were dissolved in 100g of benzene. The boiling point of the solution changed froom 80 to 80.23 Cellius. Calculate the molar mass and determine the molecular formular of the compound. Kh =2.55 C/m

2006-12-20 09:52:30 · 2 answers · asked by Khanh Ngan D 1

When i heat copper wire with a bunsen burner, what gas does the copper combine with?? Oxygen?

2006-12-20 09:52:07 · 4 answers · asked by Anonymous

I have my Chem final tomorrow, and do not know this. I know how to determine if a compound is ionic, but not how to tell if one compound is more ionic than the next.

Thanks!

2006-12-20 09:48:42 · 2 answers · asked by Buckdog06 2

Its a test question i got on my chem test and i dont understand it at all...

it says Barium carbonate will react with hydrochloric acid to produce___________, ____________, _________

I know the reactants should be this
Ba2(CO3)2 + HCl -----> ??

2006-12-20 09:48:14 · 3 answers · asked by chenying702 1

Assume an ideal solution, calculate the freezing poit of a solution cointaining 43g of SrF2 (MW: 125.6 g/mol) in 375 mL of H2o.Kr = -1.86 C/m

2006-12-20 09:47:49 · 6 answers · asked by Khanh Ngan D 1