Chemistry - February 2007

I think it has something to do with a chemical reaction

2007-02-03 03:55:03 · 2 answers · asked by Me 2

2007-02-03 03:52:49 · 5 answers · asked by Anonymous

2007-02-03 03:51:52 · 3 answers · asked by Anonymous

2007-02-03 03:05:44 · 2 answers · asked by mrkittypong 5

2007-02-03 02:47:42 · 5 answers · asked by MrYuQuan 3

If I make my tea with boiling water it has a totally different smell to that made with about 70C water. How does the temperature of the water used affect the release of the flavour from the tea leaves into the tea drink and ultimately into the air above the tea drink?

2007-02-03 02:41:36 · 3 answers · asked by Jon 2

Youve got a 5.5M of an unknown solution. You know that it is 0.212g/L. You want to know the percent by mass of Iron. You know that the iron has a concentration of 25 ppm. How do you find the percent by mass of Iron? Thank You!!

2007-02-03 02:41:04 · 2 answers · asked by Anonymous

In my experiment we used a buffer at pH 8.6. The proteins migrated towards the cathode, as expected, but what is the significance of the buffer used?

2007-02-03 02:39:11 · 1 answers · asked by Saralili R 2

The reaction of nitrogen with hydrogen to form ammonia is thermodynamically favorable.
N2(g) + 3H2(g) = 2NH3(g) DeltaHº = -92.2 kJ

The equilibrium constant for this reaction is 6.0 x 105 at 298 K. At what temperature is the equilibrium constant equal 1.0 x 103? (R = 8.31 J/mol·K)

2007-02-03 02:37:02 · 1 answers · asked by Frank 1

2007-02-03 02:34:59 · 20 answers · asked by Mike H 1

The following system is at equilibrium:
NH4Cl(s) = NH3(g) + HCl(g)

Which of the following changes will cause the reaction to move to the right?

2007-02-03 02:28:27 · 3 answers · asked by Frank 1

The reaction below was studied at a high temperature. At equilibrium, the partial pressures of the gases are as follows:
PCl5 = 1.4 x 10-4 atm, PCl3 = 2.4 x 10-2 atm, Cl2 = 3.0 x 10-1 atm.

What is the value of KP for the reaction?

PCl5(g) = PCl3(g) + Cl2(g)

2007-02-03 02:23:50 · 2 answers · asked by Anonymous

Use the equilibrium constants for the following reactions
2NO(g) = N2(g) + O2(g) K1 = 2.4 x 1030

2NO(g) + O2(g) = 2NO2(g) K2 = 2.4 x 1012

to determine the equilibrium constant for the reaction below.


N2(g) + 2O2(g) = 2NO2(g)

K =?

2007-02-03 02:22:44 · 2 answers · asked by Anonymous

Write the balanced chemical reaction which corresponds to the following equilibrium constant expression.
K = (PCO2)2/(PCO)(PO)

2007-02-03 02:21:11 · 2 answers · asked by Anonymous

Consider the balanced equation:

2A + 5B ↔ 3C + D

8 mol A are mixed with 19 mol B at an elevated temperature. After 4 mol of A have reacted, how much B is left?

Please show me the steps I have many more similar problems to do like this.. it will be greatly appreciated.. Thanks alot

2007-02-03 02:18:08 · 4 answers · asked by Anonymous

Why does water and carbon dioxide, have different shapes even though their formulas are very similar?

2007-02-03 02:06:46 · 5 answers · asked by . 6

A) 0
B)82
C)128
D)210
E)292

If anyone can help me out, I am doing a test review for a test a will be having on Tuesday.

2007-02-03 01:51:16 · 2 answers · asked by theINC 1

2007-02-03 01:46:15 · 1 answers · asked by msfresh_azimiz05 1

is it a stable atom?

2007-02-03 01:36:27 · 9 answers · asked by Ineed_ur.answer 1

2007-02-03 01:31:05 · 3 answers · asked by Irene K 1

2007-02-03 00:47:31 · 3 answers · asked by Anonymous

Also, is it a smooth or arbitrary (ie the curve keeps changing) curve?
(Assume that the substance is evenly heated)
Thank you.

2007-02-03 00:32:11 · 2 answers · asked by English Learner 2

Please someone give me an explained answer, I am writing a lab report, and people seem to say different things about it.

2007-02-03 00:16:37 · 7 answers · asked by beebee32002 2

gasses forming AIR

2007-02-02 23:51:36 · 1 answers · asked by sailoruk2001 1

2007-02-02 23:42:00 · 3 answers · asked by Anonymous

2007-02-02 23:34:09 · 12 answers · asked by frankofyl 1

2007-02-02 23:27:48 · 3 answers · asked by Anonymous

2007-02-02 23:27:47 · 4 answers · asked by Anonymous

2007-02-02 23:05:21 · 8 answers · asked by bnny 1

what happens when an Alkali metal reacts with Sulphur dioxide (sulfur dioxide)?

2007-02-02 22:57:17 · 3 answers · asked by PFX 3