Chemistry - November 2006

2006-11-19 21:16:52 · 2 answers · asked by Serina 1

2006-11-19 21:00:30 · 4 answers · asked by Anonymous

2006-11-19 20:57:15 · 8 answers · asked by Varunjay 2

like methane or hydrogen. I understand that this isn't true, but if you lit a match in a room with a 100% O2 atmosphere, would the match simply flare up much bigger than normal, or would there be an explosion?

2006-11-19 20:43:36 · 8 answers · asked by AmigaJoe 3

2006-11-19 19:07:13 · 4 answers · asked by mellissa g 1

2006-11-19 19:06:33 · 4 answers · asked by sumit 1

2006-11-19 18:11:47 · 6 answers · asked by Anonymous

and formula of the precipitate which forms.

2006-11-19 17:59:23 · 1 answers · asked by Anonymous

again.. this is for a project. This is a question that i just can't seem to find an answer to..

2006-11-19 17:56:48 · 4 answers · asked by Anonymous

I was in a chemical safety class where some one told us that when you don't wear gloves with liquid bleach that the slippery feeling you get is actually your skin melting off. Is this true?

2006-11-19 17:54:26 · 6 answers · asked by sandra_panda 6

I'm doing an aluminum analysis experiment to determine the % of aluminum in a soft drink can

2006-11-19 17:48:01 · 1 answers · asked by mrsgoody4u 1

Consider the following half-reactions and E0 values:

Ag+(aq) + e- --> Ag(s) E0 = 0.80 V
Cu2+(aq) + 2 e- --> Cu(s) E0 = 0.34 V
Pb2+(aq) + 2 e- --> E0 = -0.13 V

a/ Which of these metals or ions is the strongest oxidizing agent? Which is the strongest reducing agent?

b/ The half-reaction can be used to construct three different galvanic cells. Tell which cell delivers the higest voltage.

c/ Write the cell reaction for par (b) and calculate the values of E0, ΔG0 (in kilojoules), and K for this reaction.

d/ Calculate the voltage for the cell in part (b) if both ion concentration are 0.010M

2006-11-19 17:21:59 · 3 answers · asked by Kriztine96 1

The option for above Question is
1)2/5
2)3/5
3)4/5
4)1

2006-11-19 16:52:09 · 2 answers · asked by Anonymous

2006-11-19 16:22:28 · 4 answers · asked by Anonymous

2006-11-19 16:21:33 · 3 answers · asked by Anonymous

2006-11-19 15:45:52 · 2 answers · asked by johnny c 1

Which of the following actions will increase the K+ ion concentration in the equilibrium mixture?

A. increasing the volume of the solution
B. decreasing the volume of the solution
C. adding additional solid KNO3 to the solution
D. heating the solution

2006-11-19 15:42:53 · 1 answers · asked by Ashley C 1

2006-11-19 15:28:05 · 3 answers · asked by Anonymous

2006-11-19 14:52:31 · 1 answers · asked by Ozzie 1

it is given that there the air is composed of 78% nitrogen and 22% oxygen, so inevitably, some magnesium nitride will form during the oxidation of a strip of magnesium ribbon. but if not all the magnesium nitride is decomposed, then will the mole ratio of Mg to O be too high or too low and why?

2006-11-19 14:39:24 · 2 answers · asked by Lyn 1

Calculate the mass of 1.45 1024 molecules of N2O5. Use a molar mass with at least as many significant figures as the data given.

2006-11-19 14:09:16 · 3 answers · asked by Anonymous

What is a mol, how much is a mol and where did it come from?

2006-11-19 14:07:12 · 5 answers · asked by Anonymous

For example, Tin has an atomic number of 50, why couldn't we have an element with 714 protons? Why can't we have infinitely larger amounts of elements?

2006-11-19 13:53:26 · 5 answers · asked by pgufs 3

I cannot use an icechest or dry ice. My time frame is 3 1/2 hours. Any advice would be greatly appreciated!

2006-11-19 13:49:53 · 5 answers · asked by Gerrie E 1

A substance is either an elelment or a(n)_______

2006-11-19 13:28:39 · 5 answers · asked by Cavs in '09 ♥ Hurry Back BEN 6

2006-11-19 13:19:50 · 7 answers · asked by Luis 4

indicate whether the following elements exist as atomic species, molecular species, or extensive three dimensional structures in their most stable states at 25 degrees (C) and 1 atm and write the molecular or empirical formula for each one:
Phophorus
Iodine
Magnesium
Neon
Arsenic
Sulfur
Boron
Selenium
Gallium
Cesium
Oxxygen
*I dont understand the part of (atomic species, and molecular species??) I understand molecular and empirical formula.

2006-11-19 13:16:24 · 2 answers · asked by avalentin911 2

Methanol, CH3OH, can be made by combining gaseous carbon monoxide and hydrogen gas.
In one experiment 1.40 g of H2 is mixed with 13.85 g of CO.


What is the theoretical yield of CH3OH ? I.E., how many grams of CH3OH should be formed?

Enter a numeric answer only, no units.

Thanks for explaining it to me :)

2006-11-19 13:06:43 · 2 answers · asked by lnklike 1

The molar heat of neutralization of a strong acid and a strong base is determined by mixing 50.0 mL of 1.0 M HCl with 50.0 mL of 1.1 M NaOH in a coffee cup calorimeter. The initial temperatures of two solutions was 25.32°C and the final temperature inside the calorimeter was 31.43°C. What is the molar heat of neutralization? Assume that the specific heat capacity of the solution is identical to water and the density is 1.00 g/mL.

2006-11-19 12:53:53 · 4 answers · asked by Anonymous

i've been trying to construct a laser gun all my methods have failed any suggestions

2006-11-19 12:41:27 · 2 answers · asked by trmkitty 1