Chemistry - November 2006

and is the sodium ions attracted to the positive end of the water dipole????
god help me

2006-11-05 10:56:52 · 5 answers · asked by annie 3

2006-11-05 10:54:05 · 1 answers · asked by delta one 1

2006-11-05 10:52:37 · 9 answers · asked by annie 3

2006-11-05 10:52:21 · 5 answers · asked by Anonymous

I'm doing this chapter on heat reactions, enthalpies, etc. and I am absolutely confused. I've banged my head against the wall 21 times. I just don't understand it. Here's a question that is a good example of how all my other questions are. Could you not just give the answer, but show me how to do it? Thanks.

What is the final temperature, in degrees C, when 60.0 g of water at 80 degrees C is mixed with 40.0 g of water at 25 degrees C. The specific heat of water is 4.184 J/g x C.
a) 53 b) 58 c) 70 d) 35 e) 42

Thanks in advance

2006-11-05 10:34:52 · 1 answers · asked by chris m 2

2006-11-05 10:29:09 · 5 answers · asked by s_miw 1

the rate of enzyme activity (catalyzation) went up. I don't understand this! Do the enzymes work harder when there is more to do?

I would appreciate any explanations, or websites i might find useful. Thanks so much!

2006-11-05 10:26:07 · 2 answers · asked by ChaChaChingThing 2

2006-11-05 10:24:45 · 5 answers · asked by cluj120 2

oxygen?

a) 53.4
b) 21.6
c) 145
d) 107

Please show steps too. thanks!!

2006-11-05 10:03:15 · 4 answers · asked by Anonymous

A. 2 NA (cr) + 2 H20 (l) > 2NaOH (aq) + H2 (g)
B. Na (cr) + 2 H2O (l) > 2 NaOH (aq) + H2 (g)
C. 2 Na (cr) + 2 H2O (l) > 2 NaOH (aq) + 2 H2 (g)
D. none of the aboved

2006-11-05 09:56:36 · 2 answers · asked by allenmad 1

Draw the Lewis dot structure for an atom of oxygen. using this Lewis dot structure, hypothesize why molecules with an oxygen bonded to two other atoms always had a bent shaape (instead of a straight line).

You don't have to give me lewis dot structure for oxygen.

2006-11-05 09:40:57 · 2 answers · asked by Anonymous

A 5.00 liter sample of gas measured at 27.0 degree C and 1.25 atm of pressure has a mass of 10.13 g. What is the molecular weight of the gas in u??

Please show me how you get it also. Thank you!!
If you know, please answer, if you don't, please don't guess. I'd appreciated very much.

2006-11-05 09:40:44 · 4 answers · asked by Anonymous

1.___Heat is released when wood burns
2.___A thick wire will carry more current
than a thin piece of wire
3.___Wearing seat belts can protect you
from injury in a car crash.
4.___Gold is malleable and a good
conductor of electricity
5.___When you squeeze a ballon, it pops
6.___ In a lake, you see water waves bend
around a buoy.

a, Boyle's law
b. exothermic reaction
c. Newton's first law
d. metallic bonding
e. Ohm's law
f. diffraction

2006-11-05 09:35:33 · 2 answers · asked by allenmad 1

2006-11-05 09:32:38 · 2 answers · asked by Anonymous

1.) ClO2 or SO2
2.) HBr or HCl
3.) BeCl2 or SCl2
4.) AsF3 or AsF5

(Please show why one is more dipole then the other)

2006-11-05 09:26:18 · 3 answers · asked by Anonymous

that contains potassium hydrogen carbonate as well as sodium hydrogen carbonate, how would you determine the mass percentage of each hydrogen carbonate in the sample?
ANYONE PLEASE!!!!!!!!!
i need help, i have to finish this by tonite!!! anything at all is greatly appreciated!!!!!

2006-11-05 09:26:06 · 1 answers · asked by Anonymous

2006-11-05 09:23:11 · 2 answers · asked by allenmad 1

I did a chem lab project to determine the solubility and conductivity of six compounds, and I know I've messed some results up but I can't figure which ones. If you could go through these and tell me which ones are wrong, I would really appreciate it.

paraffin - soluble r.t. water: no soluble hot water: no soluble in r.t. mineral spirits - no soluble in hot mineral spirits - yes conducts - no

dichlorobenzene - r.t. water, hot water, r.t. mineral spirits - no hot mineral spirits - yes conducts - yes

hydroquinine - r.t. water - no hot water, r.t. spirits - yes hot spirits - no conducts - no

sugar - r.t. water - no hot water - yes r.t. spirits, hot spirits - no conducts - yes

sodium nitrate - r.t. water, hot water - yes r.t. spirits, hot spirits - no conducts - yes

potassium chloride - r.t. water - no hot water - yes r.t. spirits, hot spirits - no conducts - yes

Thank you!

2006-11-05 09:20:01 · 2 answers · asked by justinz_1fan 2

which element in the periodic table is when sea water is distilled, the liquid that is boiled off and then condensed has been shown to have molecules consisting of two atoms.

2006-11-05 09:03:45 · 2 answers · asked by Anonymous

2006-11-05 09:02:22 · 4 answers · asked by pimp_ag_2000 1

2006-11-05 08:55:29 · 6 answers · asked by Anonymous

2 NH3(g) + CO2(g) CN2H4O(s) + H2O(l) How many grams of urea are produced when 100. g of ammonia is reacted with 100. g of carbon dioxide?

2006-11-05 08:51:22 · 3 answers · asked by SphinxEyez999 2

2006-11-05 08:48:30 · 6 answers · asked by wildcat17315 1

2006-11-05 08:40:23 · 1 answers · asked by KTIZZLE 1

what volume of O2 (m^3) is needed for the complete combustion of 114g of C3H8 at 28 degrees celcius and 100kPa?

2006-11-05 08:17:38 · 2 answers · asked by Anonymous

25cm3 of a solution containing 1.86g of a metal carbonate, X2CO3, in 250cm3 exactly reacted 27cm3 of 0.100 mol dm3 hydrochoric acid. Calculate the RMM of the X2CO3.

2006-11-05 08:17:21 · 1 answers · asked by Anonymous

how many orbitals are in a 2p sublevel? if you know can you tell me why too? thanks.

2006-11-05 08:11:23 · 1 answers · asked by Why Not 3

Ba(OH)2 + 2CH3COOH ----> (CH3COO)2 Ba
0.1 M 12 g
25 cm3

2006-11-05 08:08:56 · 1 answers · asked by Anonymous

why does foam keep coldness in?

2006-11-05 07:58:16 · 3 answers · asked by Anonymous

you mix 25.0 ml of 0.234 M FeCl3 with 42.5 ml of 0.453 M NaOH.
(b)one of the reactants(FeCl3 or NaOH)is present in stoichiometric excess.what is the molar concentration of the excess reactant remaining in solution after Fe(OH)3 has been precipitated?
(the large numbers are found at the base of each element)

2006-11-05 07:57:34 · 1 answers · asked by reem h 2