Chemistry - April 2007

How do you make soluble salts?

2007-04-22 00:56:20 · 7 answers · asked by Lo 2

the importance of catalysis in our daily life (not in industry or its role as green chemistry.....) just in our daily life i dont knew what should i write about?????

2007-04-22 00:54:29 · 4 answers · asked by Anonymous

2007-04-22 00:07:40 · 3 answers · asked by Sakura 2

Faraday's 2nd Law of electrolysis is this: "The number of Faradays of electric charge required to discharge one mole of substance at an electrode is equal to the number of "excess" elementary charges on that ion."

But don't understand, esp the phrase 'the number of "excess" elementary charges on that ion'. Can sb please kindly explain it to me? Thanks!!!!

2007-04-21 22:14:52 · 1 answers · asked by formystudies6 1

2007-04-21 21:53:12 · 2 answers · asked by jellibeans_22 4

2007-04-21 21:49:53 · 4 answers · asked by Anonymous

2007-04-21 21:17:16 · 5 answers · asked by sarah- 2

calculate the density, %w/w, %w/v, ppm, and ppbof a 0.0438M NaCl solution. Also, compute for its normality if it is used as a complexing agent for Al3+ as shown by the reaction below: (MM NaCl= 58. 44g/mol)

Al3+(aq) + 4Cl-(aq) -> [AlCl4]- (aq)

2007-04-21 20:26:11 · 1 answers · asked by jann kyle_upvcc 1

Compute the molarity, molality, normality (as an acid) of H2SO4 w/c is 98% w/w. The density of the commercial H2SO4 id 1.83 g/ml. (MM H2SO4= 98.08g/mol).. Please show me your solution that's what I needed the most. Thank you in advance! Hope you would really help me. This is for my tomorow's assignment. Please.

2007-04-21 20:20:14 · 1 answers · asked by jann kyle_upvcc 1

how to extract mercury from fluorescent lights, i need mercury for an expiriment, i dont want your thats very dangerous crap, i just need to know how, and about the thats dangerous crap, half the chemists on yarhoo answers dispise you, so sites and extraction methods would be nice.

i will thank you in advanced !!!

2007-04-21 20:14:17 · 2 answers · asked by Me + Me = BANG! 2

Anybody out there know of a good method to learn how to name compounds??? How to writte formulas and rules on how to write formulas...

2007-04-21 20:07:26 · 2 answers · asked by vanillahighsky 2

"the solution guide to : Introductory chemistry: Zumdahl, fifth edition" , I need the online version, does it exixt, I only found the online version of the study guide.
Anybody have any idea out there, I couldn't find it.

2007-04-21 19:58:43 · 1 answers · asked by vanillahighsky 2

Describe the preparation of 0.50 L of 0.175 M HCIO4, starting with an 8.00 M solution of the reagent.. please show your solution. Thank you

2007-04-21 19:41:02 · 2 answers · asked by jann kyle_upvcc 1

2007-04-21 19:32:38 · 6 answers · asked by Anonymous

2007-04-21 19:27:56 · 3 answers · asked by Anonymous

2007-04-21 19:27:08 · 3 answers · asked by JEANDB 2

we performed experiment on copper cycle..i wonder why is it not advisable to dry the copper directly over a bunsen flame..what might be the reason?

2007-04-21 19:26:58 · 2 answers · asked by Rubieanne 1

when 0.376g of caffeine was burned, 0.682g carbon dioxide, 0.174g of water and 0.110g of nitrogen were formed. determine teh empirical and molecular formulas of caffeine..
im realy confuse.

2007-04-21 19:23:14 · 1 answers · asked by Rubieanne 1

2007-04-21 19:14:51 · 2 answers · asked by Rissy 1

2007-04-21 19:14:29 · 8 answers · asked by Kunal 1

Why Nitrogen can't accomodate more than 8 valence electrons and Phosporous can? Thank you.

2007-04-21 19:10:21 · 4 answers · asked by NG Yut Sei 1

for chemistery

2007-04-21 19:06:08 · 5 answers · asked by russelle 2

For science exam is it must memorise the equations by heart or their is a way to see what is the product of the reactants?

2007-04-21 18:58:32 · 6 answers · asked by try eating chocoberries 1

How do you calculate the degree of neutralization of a monobasic solution? (Please, when using notations, make sure to explain what each one means, thanks)

2007-04-21 17:08:04 · 1 answers · asked by chera 2

The standard pressure that represents an average air pressure at sea level is
59.1 kPa or 77.4 or 88.8 or 101.3

One of the lowest air pressure ever recorded was 26.22 in of mercury, if there are 35.4 mm in 1 in, what was the pressure in kPa

As the temperature of a substance decreases , the average kinetic energy of its particles...?

Describe the particle motion in Plasma

2007-04-21 16:49:45 · 2 answers · asked by Anonymous

does anyone know a store to buy potassium chloride and calcium chloride cheap

2007-04-21 16:48:18 · 5 answers · asked by geege 2

2007-04-21 16:30:54 · 1 answers · asked by Naz 1

Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 70. cm3. If the combustion of this mixture releases 860. J of energy, to what volume will the gases expand against a constant pressure of 655 torr if all the energy of combustion is converted into work to push back the piston?

2007-04-21 16:25:38 · 1 answers · asked by Leo L 2

2007-04-21 16:22:30 · 13 answers · asked by Vicki j 2

Taking liquid octane as a model for conventional petroleum, Calculate ∆combG  /kJ mol-1 for the combustion of 1mole of octane, & then 1 litre of octane. the combustion reaction is;

C8H18 (l) + 12.5 O2 -----> 8 CO2 + 9 H20

2007-04-21 16:17:12 · 1 answers · asked by cat_ren_03 1