Chemistry - January 2007

2007-01-29 03:19:57 · 2 answers · asked by Anonymous

...by heating with a Bunsen burner? In each case, explain your answer.

Ethyl alcohol (bold) in whiskey

CuSO4.4H2O/HgO (bold)

KClO3/CaCO3 (bold)

Hints:
1. Water of hydration (as in CuSO4.4H2O) can be driven out by strong heating.
2. When HgO is heated, it decomposes to Hg(l) and O2(g).
3. Carbonates (as in CaCO3) decompose upon heating yielding a metal oxide plus CO2(g).

Just for clarification, the target compounds in bold are ethyl alcohol, HgO, and CaCO3. For ethyl alcohol, maybe you could just use its empirical formula C2H6O.

2007-01-29 03:18:32 · 1 answers · asked by trypanophobic34 2

2007-01-29 03:16:23 · 1 answers · asked by goteacher33 1

2007-01-29 02:54:00 · 2 answers · asked by vidalia0927 1

2007-01-29 02:41:23 · 5 answers · asked by Emerson 5

A gallon of gas isn't even 7 pounds. How is it possible that the CO2 emissions can be almost three times that?

(Source: http://www.epa.gov/otaq/climate/420f05001.htm)

2007-01-29 02:40:45 · 5 answers · asked by presidentrichardnixon 3

I know that iron reacts with the oxygen in the air but where do i go from that?

2007-01-29 02:20:20 · 3 answers · asked by KvG 2

Suppose a container with a fluid is kept somewhere on the earth. Now, due to the gravity of the earth, the atmosphere will exert a force on the vapour just above the fluid, which is its weight (of magnitude F, say). Then, according to Newton's Third Law of Motion, the vapour just above the fluid will exert an equal & opposite force on the atmosphere (of magnitude F). Since the areas on which the two forces are acting is the vapour of the fluid just above the fluid surface, the pressure exerted by both the forces is the same, 'coz pressure=force/area.

According to definition, boiling point of a fluid is the temperature at which vapour pressure = atmospheric pressure. But we have found (in the above statement) that vapour pressure = atmospheric pressure at all conditions.

What this logic also implies is that any fluid will boil at any condition of pressure & temperature,even at absolute 0, and in gravity-less space.

Where have I gone wrong with my reasoning? Please specify.

2007-01-29 01:36:20 · 2 answers · asked by Kristada 2

I'm doing a proposal but I don't know what to write,help me please?

2007-01-29 00:51:52 · 4 answers · asked by angel wing 2

i want some formula which help me to find the correct order of filling shell of some specific atom . for example Gd=64

2007-01-29 00:49:59 · 2 answers · asked by Anonymous

2007-01-29 00:49:27 · 1 answers · asked by Hamza Q 1

2007-01-29 00:49:08 · 3 answers · asked by red_0rient 1

I think obviously their could be alot of uses for a non toxic light water. I wonder if any science geniuses out there could enlighten me.... :) Thanks, Dave

2007-01-29 00:47:12 · 3 answers · asked by David W 2

2007-01-29 00:47:01 · 2 answers · asked by bookworm0208 2

2007-01-29 00:06:23 · 4 answers · asked by sweetgurl_16 1

2007-01-28 23:50:11 · 8 answers · asked by Anonymous

2007-01-28 23:48:09 · 5 answers · asked by nomansland 2

all detail chemistry and physics crystal of CaMgO compound structure

2007-01-28 23:45:34 · 2 answers · asked by sai k 1

Gold is Au for aurora, goddess of the morning. Are there any other elements that drew their names from figures? gods, goddesses, the person that found it etc.

2007-01-28 23:37:55 · 7 answers · asked by Anonymous

2007-01-28 23:24:35 · 13 answers · asked by okiron 1

calcium carbide reacts when wet. how can they prevent it from being wet if they are mined, or seepage from the ground?

2007-01-28 22:56:33 · 4 answers · asked by tongsoy 2

2007-01-28 22:56:20 · 2 answers · asked by piangpiang 2

2007-01-28 22:45:46 · 3 answers · asked by Anonymous

2007-01-28 20:53:13 · 4 answers · asked by mak c 1

2007-01-28 20:05:39 · 8 answers · asked by aswinn s 1

In the experiment, we were to find the boiling point using an one open ended microbell capillary tube attached to a thermometer which was put open end down in a melting point capillary tube. A liquid was placed in the melting point capillary tube. The melting point apparatus was heated, and the melting point was when the stream of bubbles ceased and when the liquid begins to rise in the bell.

Q1: When the stream of bubbles in the capillary tube stops, we define this as the boiling point. Explain why this is and what is happening on the molecular level.

Q2: Why does the alcohol rise into the capillary tube? Explain what is happening on the molecular level?

2007-01-28 19:51:34 · 2 answers · asked by Andie 2

this problem deals with the wave character of particles.

2007-01-28 19:43:18 · 2 answers · asked by Candy K 1

2007-01-28 19:31:31 · 19 answers · asked by ba-jo2007 1

2007-01-28 19:12:58 · 4 answers · asked by nadieramar 1

2007-01-28 19:09:17 · 10 answers · asked by ba-jo2007 1