Chemistry - November 2006

dixoxin 0.25 mg is how many ml ?

2006-11-10 05:23:16 · 7 answers · asked by nipa_parmar 1

2006-11-10 05:05:27 · 10 answers · asked by Anonymous

I didn't know whether to put this in chemistry or physics, so I put it in chemistry, ok?

Atoms are mostly empty space. If you were to remove all the empty space in the atoms that make up Mt. Ranier, you could fit it in a jar!

Now for my question.

The only reason that solid objects cannot "go through" each other is because of the electrons in that solid PHYSICALLY repelling the electrons in the other solid due to an electron's extremely fast movements. Absolute zero means that all atomic and subatomic particles halt their movement, meaning no heat is produced, right? So would it be possible to put an object through another object if they were both in absolute zero?

2006-11-10 04:55:33 · 4 answers · asked by Leon C. Strider 2

2006-11-10 04:55:25 · 6 answers · asked by WHITETIGER 2

2006-11-10 04:51:10 · 4 answers · asked by sam_indiakasuperstar 1

500
50.2
5.21
+ 0.221
___________

I need to know how many significant figures in the answer. I know when you add it up it comes to 555.631 but I think I have to round it because of the figure 500 has no decimals. Help!

2006-11-10 04:40:15 · 5 answers · asked by Anonymous

That doesn't require any chemicals or a bunsen burner.
Something you can do in a class instead of a lab.

2006-11-10 03:51:57 · 5 answers · asked by Anonymous

How does the speed of visible light compare with the speed of gamma rays, when both speeds are measured in a vacuum?
~~~~~~*~~~~~
How are the frequency and wavelength of light related?
~~~~~~*~~~~~
As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit___?___
~~~~~~*~~~~~
How do the energy differences between the higher energy levels of an atom compare with the energy differences between the lower energy levels of the atom?
~~~~~~*~~~~~
According to the Heisenberg uncertainty principle, if the position of a moving particle is known, what other quantity CANNOT be known?
~~~~~~*~~~~
Note*
Please do not tell me to do my own homework! This is not homework! These are a few questions that I picked out from my chapter, and want to understand a bit better! I have asked people to help, but I am still having trouble understanding a few things. DO NOT acuse me of posting my homework on here! Anyone who posts and is not willing to help WILL be reported

2006-11-10 03:44:40 · 3 answers · asked by garou_yasha 2

In a mixture of CH4 and Cl2 gases, the partial pressure of CH4 is 0.145 atm. The total pressure is 0.445 atm. The temperature is 28.0oC. If the total volume of the gas mixture is 403 mL, what is the mass of Cl2 in grams?

how do i get it? step by step

2006-11-10 03:03:17 · 1 answers · asked by Anonymous

2006-11-10 02:53:46 · 5 answers · asked by johanng. 1

I can't get the first and second question on this homework that is due very soon... thanks for any help!!!
http://www.colorado.edu/chemistry/chem1111/Challenge2/CCCQ10_Nov3.pdf

2006-11-10 02:35:42 · 1 answers · asked by thesekeys 3

Im looking at the activity series.. but Im not getting this... HELP??? PLEASE??

2006-11-10 02:35:16 · 2 answers · asked by Angel Eve 6

Small quantities of oxygen gas are sometimes generated by heating KClO3 in the presence of MnO2 as a catalyst:



2KClO3(s) → 2KCl(s) + 3O2(g)



What volume (ml) of O2 is collected over water at 23.0 oC by the reaction of 0.276 g of KClO3 if the barometric pressure is 722.2 mm Hg
The vapor pressure of water at 23.0 oC is 21.1 mm Hg.

2006-11-10 02:16:09 · 2 answers · asked by Anonymous

15: As the number of neutrons emitted during a fission reaction increases, the intensity of the fission process?

increases
decreases
remains the same
none of the above

When a radioactive element undergoes an alpha disintegration, both the atomic weight and the atomic number of the daughter nucleus?

increases
decreases
remains the same
none of the above


As bismuth 210 emits electrons, the mass of the daughter nuclei formed?

increases
decreases
remains the same
none of the above


When uranium 238 changes into plutonium in an atomic reactor, the number of neutrons in atomic nuclei ?

increases
decreases
remains the same
none of the above


During fission of uranium 235 in an atomic bomb, the number of neutrons ?

increases
decreases
remains the same
Answer 4


As fusion occurs in the sun, the number of atoms of helium in the sun?

increases
decreases
remains the same
none of the above

2006-11-10 02:15:16 · 5 answers · asked by K&E4life 1

2006-11-10 02:13:02 · 3 answers · asked by Angel Eve 6

The pressure of the gas in the 1.00 L bulb is 649 mm Hg and that of the gas is the 0.500 L bulb is 455 mm Hg
What is the pressure (atm) of the system when both valves are opened, assuming the temperature remains constant ?
(neglect the volume of the capillary tube connecting the bulbs)

2006-11-10 02:10:09 · 1 answers · asked by Anonymous

Tell me about any if you have experience in it.

2006-11-10 01:48:17 · 2 answers · asked by Anonymous

Assuming life actually exists on other worlds could it be possible that some of these life forms are silicon-based rather than carbon-based? If you think not, please describe the attributes you consider lacking in silicon.

2006-11-10 01:44:59 · 6 answers · asked by Seeker 4

Please help me out, this is a problem I've been working on all morning and still nothing.

2006-11-10 01:36:17 · 1 answers · asked by thesekeys 3

2006-11-10 01:35:10 · 3 answers · asked by Thomas W 1

im trying to find out to find a good product for the floor that will withstand whatever they may be

2006-11-10 01:06:40 · 1 answers · asked by boardr 1

Find the result of the following reaction.
Zn + H2O4 --> ???

H2O4 means "H sub 2, O sub 4"

This question freaks me out. Please help.

thanks!

('o',)

2006-11-10 00:44:38 · 3 answers · asked by Bryan G 1

2006-11-10 00:41:01 · 11 answers · asked by Anonymous

2006-11-10 00:34:30 · 3 answers · asked by ennah 1

Please, what is the Lewis Structure for NCS-... I can't figure it out. Thanks for the help!

2006-11-10 00:30:05 · 2 answers · asked by thesekeys 3

I need to draw the lewis structure for that molecule. is it
F
H-C-H
F
(with the Fs above and below the central C)
or
F
H-C-F
H
(with the F and H above and below the central C)


and why? I don't know which answer to choose.. Thank you!!!

2006-11-10 00:27:07 · 1 answers · asked by thesekeys 3

2006-11-09 23:25:25 · 5 answers · asked by the_babe_rach 1

2006-11-09 23:11:02 · 4 answers · asked by Tina 1

2006-11-09 22:47:06 · 7 answers · asked by Tina 1

need 2 no this for my course

2006-11-09 22:38:17 · 7 answers · asked by jay52847 1