Chemistry - November 2006

5.51 g of the compound fills a 179.0 ml bottle with a pressure of 5183.3 mm Hg at a temperature of 24.4oC. What is the molecular formula of this compound ?

2006-11-19 08:37:51 · 2 answers · asked by geebgeebgeeb 1

138 g of C3H8 at 25.0oC and 100.0 kPa?

2006-11-19 08:36:00 · 2 answers · asked by geebgeebgeeb 1

Is it possible for a fluorescent material to emit radiation in the ultraviolet region after absrobing visible light?

2006-11-19 08:27:32 · 1 answers · asked by avalentin911 2

I really need to know the purpose of a infrared spectrometer. Are they any other methods of getting similiar results. Did this open any doors as to finding something else? Please Help!

2006-11-19 07:56:27 · 2 answers · asked by turbo4045 1

How many calories are needed to vaporize 1200 grams of water at the boiling point? How many joules?

I got 648,000 cals. but how do you change it to joules? The answer is 2711232 joules, but i dont know how you get that answer.

2006-11-19 07:51:14 · 1 answers · asked by grace is good for you 2

2006-11-19 07:38:41 · 1 answers · asked by Theory1 3

wat's the chemical definition of salt

2006-11-19 06:48:38 · 15 answers · asked by Aeromina 2

If the atomic number on the periodic table means how many protons you have.. how do you know how many electrons and neutrons are there?

Im doing a project on Potassium. the atomic number is 19.

please&thanks.

2006-11-19 06:44:24 · 7 answers · asked by Anonymous

2006-11-19 06:13:01 · 3 answers · asked by Alex 1

who discovered iron and in what year was iron discovered

2006-11-19 05:43:47 · 2 answers · asked by cindy 3

i want details of isomerism types. give all type
just mention their name plzz

2006-11-19 05:38:23 · 3 answers · asked by love minister 2

It is a chemistry question. I also want to know how to get that answer? Thank You

2006-11-19 05:35:23 · 1 answers · asked by Am 1

1. What is the total number of hydrogen atoms in a molecule of butene?

2. Which compound has the least ionic character?
A) NO B) MgS C) KI D) HCl

3.Which compound contains ionic bonds?
A). NaBr(s) B). C6H12O6(s) C). HBr(g)
D). CO2(g)

4. Which structural formula represents a compound that is a member of the alkene series?
A. H H
| |
H-C - C-OH
H H | |
| | H H
B. H-C=C-H

H H
| |
C. H-C-C-H
I I
H H

D. H-C_=_C-H for this one there is 3 lines between the C

5. Which of the following is a molecular substance?
A) KClO3 B) CaO C) C02 D) KCI

6.A molecule of ethane and a molecule of ethene both have the same
A)number of hydrogen atoms
C) molecular formula
B) number of caroon atoms
D) empirical formula

17)What type of bonds are formed when metal atoms combine with nonmetal atoms?
A)ionic bonds C) metallic bonds
B) non-polar covalent bonds D) polar covalent bonds

2006-11-19 05:34:44 · 2 answers · asked by James O 1

2006-11-19 05:28:17 · 5 answers · asked by !¿question!? 2

Calculate DS in units of J/K for the formation of 1 mol of HI(g) from its elements in their standard states.
Work:
H(g) + I(g) > HI(g)
1mol HI * 206.33J/K - ( 1mol H(g)*114.60J/K + 1mol I(g)*180.67) =
-88.94 J/K

Calculate DS for the formation of 1 mole of PCl5(g) from the elements P4(s, white) and Cl2(g).
Work:
P4(s) + 10CL2(g) > 4PCl5

4*353J/K - (41.1 J/K + 10*223 J/K) = -859 J/K


Sulfur dioxide is released in the combustion of coal. Scrubbers remove much of the SO2 from the flue gases by reaction with lime slurries containing solid calcium hydroxide to form solid calcium sulfite and liquid water. Calculate So in units of J/K for the reaction of exactly one mole of sulfur dioxide gas in this scrubbing process at 298 K.
[So of calcium sulfite(s) = 101.4 J/mol.K]

My Work:
SO2 + calcium sulfite > CaSO4+H2O
(107+69.94) - (248.1+101.4) = -173 J/K

being that its at 298K I dont think i need to use G=H-TS

2006-11-19 05:16:06 · 3 answers · asked by jnieves01 1

2006-11-19 05:08:17 · 9 answers · asked by D 1

2006-11-19 04:48:37 · 3 answers · asked by Anonymous

Can you tell us the melting point and the boiling point of these elements.
IRON
TIN
LEAD
COPPER
GAS
OXYGEN
thank you if you can help
Saved my life.

2006-11-19 04:48:22 · 8 answers · asked by spidermike 2

2006-11-19 04:41:09 · 6 answers · asked by ANGELIC F 1

NH3, HF, H2O
Thanks

2006-11-19 04:28:03 · 3 answers · asked by tomzy 2

The direct conversion of H2 and N2 gases at high pressure using a catalyst is:

N2 + 3H2 <--> 2NH3

How many liters of 2NH3 can be obtained using 27.7L of N2 and 102.3L of H2? Assuming complete conversion and constant pressure of 500 atm and constant temperature of 500 K.

I'm really stuck on this problem, any help would be appreciated.

2006-11-19 04:27:14 · 1 answers · asked by mentallyatrophic 1

What is the balanced chemical equation for the reaction between EDTA and Ca2+ ?

2006-11-19 04:11:59 · 2 answers · asked by Anonymous

2006-11-19 04:10:31 · 2 answers · asked by Anonymous

2006-11-19 03:39:22 · 11 answers · asked by EKKA 1

I always read in the books about really long molecular forumulas about amino acids and carbohydrates but i wonder, since we can't see atoms at all, how do scientists determine the amount and they types of atoms as well as the type and size of the bonds?

2006-11-19 03:00:10 · 2 answers · asked by Anonymous

if 8g CuO is heated, what mass of Cu metal is formed?

2006-11-19 02:50:13 · 7 answers · asked by LiNnY 3

2006-11-19 02:38:56 · 4 answers · asked by MisterMeToo 1

2006-11-19 02:33:18 · 1 answers · asked by Akash Jain 4

2006-11-19 02:31:51 · 5 answers · asked by Peter W 2

a)Explain how the disolution process of CaBr2 differs from that of glucose(C6H12O6)?
b)A 2.00M CaBr2 solution and a 2.00M glucose solution are both placed in a freezer whose temperature is -5C. which solution would NOT freeze? Kf=1.86C/M. WHY?

This is a bonus question for my chem class (8th grade) we are allowed to find the answer anywhere, then we have to (explain) present it to the class for bonus points. It could boost my grade to an A. PLEASE HELP if you can.

2006-11-19 02:30:06 · 1 answers · asked by mtta_girl 2