Chemistry - November 2007

a)endergonic
b)exothermic
c)endothermic
d)spontaneou
e)enthalpic

2007-11-01 14:56:51 · 1 answers · asked by Christina S 1

I am currently working with Synthesis Reaction, Decomposition Reaction, Single-Replacement Reaction, Double-Replacement Reaction and Combustion Reaction. I am given a few problems and told to do them, but I do not understand them, here is my first one

MagnesiumBromide + Chlorine ------>

Now I do understand balancing after you get the entire equation, but what I don't understand is how to balance the above, get the second side of it and figure out witch of the above 5 types I gave it will turn into. If anyone has either a really detailed site explaining how to do this then I would love that or if someone would like to show me how to go through this problem, then that would be awesome as well. Ill go ahead and give one more in case someone decides to show me how to do this and I would be pleased with a second walk through as well with this one.

Aluminum + Iron(III)Oxide ----->

Please and thank you all!!

2007-11-01 14:51:31 · 4 answers · asked by Anonymous

2007-11-01 14:41:50 · 0 answers · asked by lunis_mcleod 2

How many milliliters of 2.50 M H2SO4 are needed to neutralize 25.0 g of NaOH

2007-11-01 14:38:00 · 1 answers · asked by dukebasketball1992 2

2007-11-01 14:36:45 · 6 answers · asked by madeup6 4

give the structural, molecular, and empirical formulas of hydrogen peroxide.?!

2007-11-01 14:36:09 · 2 answers · asked by Anonymous

At STP 4.83 L of chlorine is produced during a chemical reaction. What is the mass of this gas? Answer in unites of g.
(please include all decimal places; no sig figs, float)

2007-11-01 14:25:00 · 3 answers · asked by The Wind 2

A sample of 1.029g of KC8H5O4 was titrated with an NAOH solution of unknown concentration. If 22.83 mL of base was used to reach the endpoint, what was the concentration of NaOH? What mass of KC8H5O4 should be used such that a volume of NaOH between 35-40 mL is needed to reach the endpoint?

2007-11-01 14:24:57 · 2 answers · asked by Anonymous

2007-11-01 14:18:17 · 2 answers · asked by cldgaray 1

A 0.35 M solution of a weak acid is 2.0% dissociated.

(a) Calculate the [H3O+], pH, [OH -], and pOH of the solution.
[H3O+]
_____
pH
_____
[OH -]
_____
pOH
_____
(b) Calculate Ka of the acid.
_____

2007-11-01 14:05:30 · 1 answers · asked by Anonymous

?

2007-11-01 14:02:57 · 1 answers · asked by Chris 2

2007-11-01 13:59:08 · 4 answers · asked by Average Joes 4

why must objects be cooled before their mass is determined on a sensitive balance?

2007-11-01 13:52:59 · 3 answers · asked by Tina 1

can someone please help me name these compounds!:

SnF2
HF
HBrO
IF
HI
HIO4
I2O5
Ba(CIO4)
(NH4)2SO4
Na2SO4 X 10 H20
FeBr3 X 6 H20
FeSiF6 X 6 H2O

2007-11-01 13:45:16 · 3 answers · asked by Anonymous

2007-11-01 13:41:09 · 3 answers · asked by Chlorine 2

I am still not sure if he was aware of the concept but neglected to see the pattern, or if he just didnt have access to the information.

2007-11-01 13:41:00 · 5 answers · asked by motoson 4

please explain in understandable terms- if you can't explain it well, is there a web site you got it from/ found it on? Thank you!!!! (for Chemistry class)

2007-11-01 13:36:06 · 2 answers · asked by jada 1

The equilibrium constant K for the reaction C (s) + CO_2(g) <--> 2CO (g) is 1.9 at 1000 K and 0.133 at 298 K.

1. If excess C is allowed to react with 21.0 g of CO_2 in a 3.00-L flask, how many grams of CO are produced at 298 K? At 1000k?

2. What are the partial pressures of each gas at 298 K? At 1000k?

3. Would you expect K to increase or decrease if the pressure were increased at constant temperature and volume?

2007-11-01 12:42:25 · 2 answers · asked by Forest green 2

WHAT ARE SOME BRANDS FOR IT? AND UMM IF POSSIBLE ANY LINKS FOR INFORMATION! THANKS ILY<333!

2007-11-01 12:30:16 · 1 answers · asked by maria f 2

2007-11-01 12:27:35 · 2 answers · asked by Anonymous

Calculate the pH of a mixture containing equal volumes of
0.120 M HC3H5O2 ( use Ka = 1.30 x 10 -5 ) and 0.120 M NaC3H5O2 .

any help would be greatly appreciaTEd!

2007-11-01 12:11:07 · 2 answers · asked by nietzsche 1

Calculate the solubility in grams per liter of Hg2Cl2,
Ksp = 1.10 x 10-18 ,

any help would be greatly appreciaTEd!

2007-11-01 12:10:13 · 2 answers · asked by nietzsche 1

102. mL of a solution of quinine contains 206.0 x 10-3 mol of quinine. If this is titrated with 0.0200 M HCl, what is the pH at the stoichiometric point? Quinine is monobasic with
Kb = 7.90 x 10-6

any help would be greatly appreciated!

2007-11-01 12:06:32 · 1 answers · asked by nietzsche 1

At STP 4.95 L of chlorine is produced during a chemical reaction. What is the mass of this gas in grams?

it's not 15.6537, 7.82683, 15.666, or 7.83298 ...so then what is it?

thanks ~!

2007-11-01 11:27:38 · 1 answers · asked by lilcbcgurl 1

What are some household items that may contain...
Oxygen
Sulfur
Selenium
Tellurium
Polonium

HELP?

2007-11-01 11:19:17 · 1 answers · asked by Anonymous

Does adding salt to water effect the boiling point of the water?
why?

2007-11-01 10:28:24 · 1 answers · asked by pleiades 2

0.419g of H2O. Determine the empirical formula of ethyl butyrate?

Need help.

2007-11-01 09:55:22 · 1 answers · asked by Anonymous

I need to find out Chemical issues in the news please help??

2007-11-01 09:50:09 · 1 answers · asked by ? 4

2007-11-01 09:49:35 · 4 answers · asked by Fung 1

The volume of a gas at 273 degrees celcius is 200. liters. If the volume is decreased to 100. liters at constant pressure, what will be the new temperature of the gas?

please also show steps how to solve

2007-11-01 09:44:28 · 2 answers · asked by Mets Fan 1