Chemistry - May 2007

Similarly, if there is 1 mole of H2O, does that mean that there is .5 mole of H2 and .5 mole of O?

2007-05-08 12:45:35 · 2 answers · asked by Aadi C 2

How do this process split water into O2 gas and H+ ions

and convert the H+ ions into Hydrogen gas ?

2007-05-08 12:36:32 · 1 answers · asked by joeb1236 2

2007-05-08 12:30:15 · 1 answers · asked by erika 1

HINT: calculate the total moles present and the total volume the molecules are dissolving in




calculate the final concentration if 2.00 L of 3.00 M NaCl and 4.00L of 1.50 M NaCl are mixed. assume there is no volume contraction upon mixing

(help me w/ this plzzzz T_T)

2007-05-08 12:12:13 · 1 answers · asked by joey 1

1)2 Na + Cl2 2 NaCl
2)H2 + Cl2 2 HCl
3)NH3 + HCl NH4+ + Cl-
4)2 KClO3 2 KCl + 3 O2
5)H2SO4 + 2 KOH K2SO4 + 2 H2O
6)Zn + CuSO4 ZnSO4 + Cu
7)C + O2 CO2
8)NaCl + AgNO3 AgCl + NaNO3
9)2 H2O 2 H2 + O2

How do you know?? because i got some of them but the long equations i don't get.

2007-05-08 10:32:59 · 1 answers · asked by wonderer 1

An interesting fact about this element (CARBON) . Eg: Is it dangerous? Why? Does it have any strange characteristics? Is it very valuable?

2007-05-08 10:29:57 · 2 answers · asked by Anonymous

a) PH3 + H2O <-> PH+4 + OH-

b) HCO3 + HCO3 <-> H2CO3 + CO3 -2

2007-05-08 10:23:13 · 1 answers · asked by Doza 1

1. Tetraphosporus Hexaoxide

2. Disulfur dichloride

3. Tetraphosphorus trisulfide

4. Hexacarbon hexahydride

5. Tetracarbon Hexaoxide

2007-05-08 10:21:48 · 1 answers · asked by Anonymous

a gas collected over water is known to have a partial pressure of 97.40kPa. What is the temp. given that the atmospheric pressure is 101.64kPa?

2007-05-08 10:11:58 · 1 answers · asked by steve 1

2007-05-08 09:17:56 · 1 answers · asked by mugen_ex 1

put the question in te right category

2007-05-08 09:15:16 · 3 answers · asked by lita 2

Also, if you were to change the experiment how could you conserve the mass?

2007-05-08 09:10:17 · 4 answers · asked by BAT 2

anyone kno how to figure this out?

2007-05-08 08:57:46 · 4 answers · asked by mrchrister93023 1

what the empiracal formula and the molecular formula of the compounds

2007-05-08 08:57:24 · 3 answers · asked by mrchrister93023 1

use electronic resources two compare two physicla properties and one chemical property of these compounds..

??????????????????


gahhhh im so dumb.. can anyone help?

2007-05-08 08:56:18 · 2 answers · asked by mrchrister93023 1

b) also if the molar mass of this compound is 119.5 determine the molecular formula...


i am a newb to chemistry.. can someone do this for me.. so i can learn how to do it. thanks :)

2007-05-08 08:48:36 · 2 answers · asked by mrchrister93023 1

how can two protiens with the exact same number and type of amino acids have different primary structures?

2007-05-08 08:38:06 · 2 answers · asked by Jacquline M 1

Identify the functional group (by name) of the following compound:

CH3CH(NH2)COOH

2007-05-08 08:38:04 · 3 answers · asked by Kristin H 1

I work in a lab with a mili-q system, that filters water. The question has been asked if the water from it could be harmful is ingested.

2007-05-08 08:36:48 · 10 answers · asked by Anonymous

ok I have a few problems for my hw that I can't figure out...here they are

Baking soda yields dihydrogen monoxide, sodium carbonate, and _________.

Copper (II) will react with silver nitrate to form copper (II) nitrate and _________.

________ reacts with silver nitrate to form sodium nitrate and silver chloride.

and the last one


NaOH + FeCl3(as a subscript) --------> _________ + Fe(OH)3(subscript)


If you can help please do lol thxx

2007-05-08 08:30:40 · 2 answers · asked by Marissa 2

i need to know more about artificial blood , especially sth called Oxycyte??? can it be made in a lab ? what is the problems scientists have with this substance?

2007-05-08 08:16:00 · 1 answers · asked by alizeeer2005 1

i am 26 most people my age are dating or meirry i have never been on a date or meirry is it to late

2007-05-08 08:08:23 · 4 answers · asked by lita 2

2007-05-08 07:54:22 · 4 answers · asked by Anonymous

Plutonium 210 has a half life of 140 days. Suppose a sample of this substance has a mass of 300g.

a) find the mass of plutonium 210 remaining after one year.

b) How long will it take for the sample to decay to a mass of 200 mg of plutonium 210.

Please show step by step

2007-05-08 07:48:35 · 1 answers · asked by Anonymous

1: Sodium nitrate is generally used because it is inexpensive and sulfuric acid is used because of its high boiling point.
True
False

2: The Ostwald Process involves the oxidation of ammonia.
True
False

3: Pure nitric acid is a blue liquid of low boiling point (86°C).
True
False

4: Nitric acid, when diluted, turns blue litmus paper red.
True
False

5: No nitrates are ever used as fertilizers.
True
False

2007-05-08 07:32:40 · 3 answers · asked by frickenawesomekoreanandyouknowit 2

if you don't know the answers then don't say anything.

1: The Frasch process is used to mine
a)lead
b)potassium
c)sulfur
d)uranium

2: The most striking physical characteristic of hydrogen sulfide is its
a)color
b)density
c)odor
d)solubility in water

3: The formula for hydrosulfuric acid is
a)H2S
b)H2SO2
c)H2SO3
d)H2SO4

4: If the volume of sulfuric acid in an uncovered beaker increased gradually during a perios of several weeks, the increase was probably due to the absorption of
a)carbon dioxide
b)nitrogen
c)oxygen
d)water

5: The most stable form of sulfur at room temperatre is
a)amorphous
b)monoclinic
c)prismatic
d)rhombic

6: Sulfuric acid is used in the preparation of other acids because it
a)is an oxidizing agent
b)is dense
c)has a high boiling point
d)is a dehydrating agent

7: The acid contained in storage batteries is
a)acetic
b)hydrochloric
c)nitric
d)sulfuric

thanks.

2007-05-08 07:30:11 · 5 answers · asked by frickenawesomekoreanandyouknowit 2

2007-05-08 07:08:28 · 4 answers · asked by Anonymous

then how can they cancel out each other.......as the magnitude of resultant of two dipole moments of B-Cl bond will not be equal to the dipole mom. of the single B-Cl bond.??????????

2007-05-08 06:19:49 · 3 answers · asked by Anonymous

I want to make a battery for my school science project. I know that there is a way to use an acid(like lemon juice or other light acid) and two metals to create a battery that can run a wall-clock. I want the names of the two metals. And I also need an explanation for this experiment. Someone please help me.

2007-05-08 05:48:53 · 4 answers · asked by SuperSonicHT 3

Why does chlorine go colourless in a layer of hexane, bromine yellow/ orange and iodine purple? I thought hexane wasn't reactive.
Do the halogens react with water/ air?

2007-05-08 05:12:10 · 2 answers · asked by Muppet 2