Chemistry - March 2007

2007-03-26 08:34:14 · 3 answers · asked by princesssxxoo 1

2007-03-26 08:30:56 · 2 answers · asked by Anonymous

How do you know? and which gas is given off?
- What's the next reactive metal?
Thanks.

2007-03-26 08:30:43 · 17 answers · asked by Anonymous

A.H20
B.C02
C H2
D.oh
E02H

2007-03-26 08:26:27 · 10 answers · asked by ladona c 1

It is exposed to the atmosphere by means of a 10m long 150mm bore pipe. Please discuss if there will be a problem with oxygen from the atmosphere diffusing in the deoxygenated water.

2007-03-26 08:18:17 · 4 answers · asked by SAREK 3

Which of the following are reducing agents ?



a) H2


b) F2


c) Al


d) Cr2O72-


e) C

2007-03-26 08:15:30 · 1 answers · asked by NeWYoRKnuT 2

could you seperate the dioxide from the hydrogen in water ( i am not a scientist so simple answers please)

if you can why do they not invent something for deep sea divers and people on submarines to use that converts the sea water so they have unlimited amounts of oxygen without re survacing

i thought about this in the middle of the night and i havent stopped thinking about it since

the reason i asked what hydrogen is used for is because it was seperated from the water then i take it it would be a wasted by product wouldnt it

thank you for your answers

xxx

2007-03-26 08:14:52 · 9 answers · asked by vici 4

What are the differences? and why?

2007-03-26 08:12:28 · 4 answers · asked by Mike 1

how many moles of Li2CO3 are produced from the complete reaction of 4.32 moles of LiOH ?

Enter a numeric answer only, no units. idea on a solution? thanks.

2007-03-26 08:10:14 · 1 answers · asked by peterdk86 1

How do batteries differ from cells? What arrangement of three cells will result in the greatest electric current? Which arrangement would result in the greatest longevity (lasts longest) for the battery?

Describe three factors within a voltaic cell that you could manipulate in order to produce a cell with the highest possible voltage. For each factor describe how you would manipulate it.

Describe the advantages and disadvantages for using fuel cells compared to other types of electrochemical cells.

2007-03-26 07:51:54 · 3 answers · asked by Anonymous

Starting with 14.0 ml of 3.70 × 10−2 M BaI2, how many grams of MgSO4 can be added to the solution before BaSO4 begins to precipitate ?

2007-03-26 07:50:15 · 2 answers · asked by Anonymous

Urea, NH2CONH2, is manufactured from ammonia and carbon dioxide according to the following equation:

2 NH3 (g) + CO2 (g)  NH2CONH2 (aq) + H2O (l)

What volume of ammonia gas at 25o C and 1.5 atm is needed to make 500g of urea?

Data: Atomic weights N = 14.01, O = 16.00, H = 1.01, C = 12.01

PV = nRT where R = .0821 atm.L / K.mol

Molarity, mol/L = 1000 n / V where n = moles and V = volume in mL

Please help me!!!

2007-03-26 07:31:40 · 4 answers · asked by Falcur 1

2007-03-26 07:26:07 · 4 answers · asked by Silas O 1

To make magic mud mix Table spoons of cornflour and water in the ratio of 5:2.

2007-03-26 07:25:48 · 6 answers · asked by Danny_b 1

How many grams of BaF2 will disslove in 0.487 L of a 0.104 M NaF solution ?


Ksp = 1.80e−7

2007-03-26 07:22:40 · 1 answers · asked by Anonymous

Calculate the solubility in grams per liter (note that Ksp is in terms of moles and liters) of Ag2CrO4
Ksp = 9.00 x 10−12

2007-03-26 07:19:30 · 3 answers · asked by giggles9783 1

2007-03-26 07:12:26 · 2 answers · asked by jo n jo 5

2007-03-26 06:53:47 · 1 answers · asked by Anonymous

2007-03-26 06:53:08 · 1 answers · asked by Anonymous

2007-03-26 06:52:31 · 1 answers · asked by Anonymous

2007-03-26 06:37:05 · 5 answers · asked by ASAAD E 1

Ba(ClO3)---> BaCl2 + O2

2007-03-26 06:28:33 · 1 answers · asked by Anonymous

hi im confused in acids and bases
websites say acids are those that have an excess in hydrogen H+ ions, and some others say that they are those that have a greater concentration of hydronium ions H3O+ ions...are they the same things or not? and why do I see H+ ions used more frequently..which is more correct?

2007-03-26 06:23:40 · 2 answers · asked by blubbablub 1

2007-03-26 06:19:59 · 7 answers · asked by Anonymous

2007-03-26 06:11:39 · 1 answers · asked by bballchic601 1

hsa to do with buffer solutions category. propanoic acid is name of compund.

2007-03-26 06:10:09 · 3 answers · asked by Uli V 2

a what is the reaction of acetaldehyde with concentrated sulphuric acid?

1 decomposition
2 polymerisation
3 no reaction
4 charred to black residue


b calcium acetate on heating under distillation gives

1 acetaldehyde and calcium oxide
2 calcium carbonate and acetic acid
3 acetone and calcium carbonate
4 calcium oxide and co2


please third one which I have asked so many times but no one ans it

equivalent cunductance of an electrolyte containing NaFat infinite dillution is 90.1.if NaFis replased by KFwhat is the value of equivalent cunductance?
1 90.1
2 111.2
3 0
4 222.4
values are in ohms cms
please specify if you are not sure

2007-03-26 05:56:38 · 3 answers · asked by Anonymous

Must have by 10:25a.m.....

2007-03-26 05:19:57 · 1 answers · asked by Anonymous

Must have answer by 3-26-07 thanks alot!be for 10:20

2007-03-26 05:14:11 · 6 answers · asked by Anonymous

Elaboration would be appreciated.

2007-03-26 05:11:04 · 2 answers · asked by Faisaltheonly1 2