Chemistry - October 2007

Calculate the density, g/cm3, of propane C3H8 at 107.0C and 868 torr.

I am having trouble with this chemistry problem and if anyone could help me out that would be great. Please don't just give the answer, explain why. Thanks!

2007-10-30 07:51:17 · 1 answers · asked by Anonymous

In cooking over an open flame, a yellow flame is often observed(particularly if one spills some food on the falme). continue with question.

2007-10-30 07:45:01 · 9 answers · asked by preety 3

2007-10-30 07:44:36 · 2 answers · asked by Anonymous

chloride and the other is calcium chloride. Describe a qualitative test you could perfrom to determine which is whic? Be specific. You will need to write the chemical equations that describes any chemical reaction performed here - if appropriate.

2007-10-30 07:40:19 · 2 answers · asked by Anonymous

1) Indicate whether a reaction would occur when you mix aqueous solutions of each of the following two substances.

Yes or No

potassium chloride and bromine.
sodium iodide and bromine.
sodium bromide and iodine.
potassium iodide and chlorine.

2)What is the result of mixing each of the following pairs of reagents?

NaI + Br2

I− + Cl2

KCl + Br2

2007-10-30 07:38:58 · 5 answers · asked by KC 1

2007-10-30 07:31:14 · 2 answers · asked by buttercrunch 1

A patient weighs 146 pounds and is t orecieve a drug at a dosage of 45.0 mg per kg of body weight. The drug is supplied as a solution that contains 25.0 mg of drug per mL. How many mL of the drug should the patient recieve?
(1 pound= 454grams)

2007-10-30 07:25:37 · 4 answers · asked by Anonymous

can someone tell me wich scientists have these elements named after them? Nobelium, Einstenium, Cutium, Fermium, Mendelevium.

2007-10-30 07:22:29 · 1 answers · asked by Larry 2

Which of the following elements is found in the main group elements of the periodic table?

1. Fe
2. Md
3. Hg
4. Se

I believe it is Fe. WHat makes it a part of the main group?

2007-10-30 07:20:49 · 6 answers · asked by Anonymous

1-pot.acetate
2-amm.sulphate
3-zinc.phosphate
4-calcium oxide
5-aluminium sulphide

***Name the following
1-MgCL2
2-Cu(NO3)2
3-Li2(so4)
4-Ca(OH)2
5-FeSO4
6-H2SO4

2007-10-30 07:19:07 · 2 answers · asked by mohamed r 1

a typical aspirin tablet contains 5.00 grains of pure aspirin analgesic compund. the rest of the tablet is starch. How many aspirin tablets can be made from 100.0 grams of pure aspirin? (1.00 grams= 15.4 grains)

2007-10-30 07:15:30 · 2 answers · asked by Anonymous

enter an answer in exponential notation use e, example: 1.47e-8

2007-10-30 07:00:12 · 2 answers · asked by chemical.garry 1

Which part of an atom has a mass approximately equal to 1/2000 of the mass of a common hydrogen atom?
a. nucleus c. proton
b. electron d. electron cloud

2007-10-30 06:42:42 · 5 answers · asked by -BrownEyedBeauty- 1

SeO2 (s) + KOH (aq) -->

I know H2SeO2 is formed but wat happens with the K

2007-10-30 06:42:24 · 3 answers · asked by gabucha 1

a hydrocarbon is subjected to combustion analysis. a sample of the compound gave 0.314g CO2 and 0.129g H2O.
a)calculate the mass of carbon and hydrogen in the sample

b) find the no of moles of carbon and hydrogen in the sample of the compound

c)what is the empirical formulae

2007-10-30 06:39:18 · 2 answers · asked by Anonymous

I am doing some silver soldering and I have to use jewellers pickle which is acid based, but mild. What kind of container can I use. I believe some kind of poly plastic is suitable.. Anyone know please?

2007-10-30 06:30:03 · 2 answers · asked by michelle l 1

2007-10-30 06:27:04 · 4 answers · asked by Anonymous

2007-10-30 06:26:27 · 1 answers · asked by Anonymous

Cobalt-60 is a radioactive isotope used to treat cancers of the brain and other tissues. A gamma ray emitted by an atom of this isotope has an energy of 1.33 MeV (million electron volts; 1 eV = 1.602 10-19 J). What is the frequency (in Hz) and wavelength (in m) of this gamma ray?
frequency
Hz
wavelength
m

2007-10-30 06:05:49 · 1 answers · asked by jnester0289 1

An alpha particle (mass = 6.6 10-24 g) emitted by radium travels at 2.5 107 0.1 107 mi/h.
(a) What is its de Broglie wavelength (in meters)?

(b) What is the uncertainty in its position?

2007-10-30 05:48:37 · 1 answers · asked by jnester0289 1

How fast must a 148 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with wavelength = 100. pm?

2007-10-30 05:47:00 · 1 answers · asked by jnester0289 1

2007-10-30 05:17:27 · 6 answers · asked by sillyputty13 1

2007-10-30 04:27:04 · 3 answers · asked by Anonymous

2007-10-30 04:06:25 · 6 answers · asked by tallerballer 1

I found out the other day thet the water works near me has over 1000Kg of chlorine stored there and its in a plase surrounded by houses.

Surely that cant be safe can it?

2007-10-30 03:32:15 · 5 answers · asked by lucylonglegs 1

2007-10-30 03:27:36 · 5 answers · asked by Anonymous

(a) AgNO3 + AlCl3 →

(b) Cu(NO3)2 + Na2CO3 →

(c) HgCl2 + KOH →

(d) CO(NO3) 2 + KOH →





I'm stuck on these. Can someone please help. It is much appreciated!!! Thanks!!!

2007-10-30 02:54:21 · 1 answers · asked by PaNaSoNiCeDgE 1

2007-10-30 01:25:13 · 4 answers · asked by ~Jesus*Girl~ 2

we can solidify mercury byadding sulphur. but btaned mercury is impure. now how can we retain the solid mercury by removing impurities and making it pure. is there any other process.

2007-10-30 00:37:49 · 1 answers · asked by vijay r 1

What is the sum of the coefficient? Don't forget coefficients of one. Use the smallest whole number coefficients.

a.6
b.7
c.8
d.4
e.5

2007-10-29 23:23:49 · 3 answers · asked by Anonymous