Chemistry - May 2007

what is the balanced chemical equation?

what is the balanced complete ionic equation?

2007-05-14 03:54:34 · 2 answers · asked by Anonymous

this is the question frm 12th science syllabus

2007-05-14 03:50:27 · 7 answers · asked by gaurav aradhye 1

2007-05-14 03:50:15 · 2 answers · asked by scime 1

How would you make 90 ml. of a 1.20 M aqueous solution of sodium oxalate (Na2C204) from a 2.00 M solution of sodium oxalate?

Please explain...

2007-05-14 03:41:41 · 1 answers · asked by Anonymous

2007-05-14 03:30:00 · 4 answers · asked by vballgal75 1

......process that happens when we erase pencil writings using an eraser made of rubber ( it is related to physical chemistry)?

2007-05-14 03:19:13 · 1 answers · asked by Anonymous

i need to use simple products available at home which are cheap and the process of which is easy and takes less time.i need the chemical activity also along with the tests.

2007-05-14 03:02:03 · 2 answers · asked by magnum 2

easier soap making process.chemical reactions and activities and tests for soap.a home made soap making process.

2007-05-14 02:29:48 · 3 answers · asked by magnum 2

2007-05-14 01:35:59 · 6 answers · asked by Anonymous

Science

2007-05-14 01:34:48 · 1 answers · asked by xbox3604life 2

2007-05-14 01:26:31 · 1 answers · asked by Ampac M 1

(Fe2+ is oxidized to Fe3+ and MnO4- is reduced to Mn2+).

2007-05-14 01:20:41 · 2 answers · asked by Aaron 2

2007-05-14 01:19:38 · 4 answers · asked by Anonymous

Is it true that atoms are not solid and are mostly space? If so does that mean that there is space in crystal lattice structures?

2007-05-14 00:01:22 · 4 answers · asked by Gideon 1

If the concentration of a reactant is doubled and the reaction rate quadrupled, what must be the order of the reaction with respect to that reactant

2007-05-13 23:56:35 · 1 answers · asked by Anonymous

to the following reaction
2C^2H^2+5O^2-------->4CO^2+2H2O

HOW MANY GRAMS OF EACH PRODUCT ARE PRODUCED WHEN 2.50x10^4 of C^2H^2 BURNS COMPLETELY

2007-05-13 23:53:26 · 3 answers · asked by sxe 1

what mass of AgCl is produced to form 75.0g of AgNO3?

2007-05-13 23:44:06 · 2 answers · asked by sxe 1

In our qualitative analysis of group III cations, we were told to acidify the mixture and then add ammonia (a base) until the solution was basic to pH paper. What may be the purpose of the addition of acid/ammonia?

thanks a lot! :)

2007-05-13 21:35:15 · 1 answers · asked by piangpiang 2

group theory

2007-05-13 21:27:27 · 2 answers · asked by Marika G 1

1)I have made a thermometer which measures temperature by the compressing and expanding of gas in a piston. I have measured that at 1000 C the volume of the piston is 20 L. What is the temperature outside if the piston has a volume of 15 L? What would be appropriate clothing for the weather?

2)How hot will a 2.3 L balloon have to get to expand to a volume of 400 L? Assume that the initial temperature of the balloon is 25 0C.

2007-05-13 21:09:19 · 1 answers · asked by Joesph P 1

1)The temperature inside my refrigerator is about 40 Celsius. If I place a balloon in my fridge that initially has a temperature of 220 C and a volume of 0.5 liters, what will be the volume of the balloon when it is fully cooled by my refrigerator?

2)A man heats a balloon in the oven. If the balloon initially has a volume of 0.4 liters and a temperature of 20 0C, what will the volume of the balloon be after he heats it to a temperature of 250 0C?

2007-05-13 21:08:32 · 1 answers · asked by Joesph P 1

I have a set of gas analysis, the flow rate is 39658.38 Ib/hr, gas density is 0.672. In this case, an amount of 15590.4 Ib/hr vapour need to add to this set of gas. How should I calculate the mole % for the new set of stream which consist of water.

Gas analysis as follow:
Gas Mole%
Nitrogen 0.8
Methane 86.52
Carbon dioxide 10.72
ethane 1.69
propane 0.19
i-butane 0.04
n-pentane 0.01
hydrogen sulfide 0.01

2007-05-13 21:05:41 · 1 answers · asked by LG 1

Explain why the molecular structure of dihydrogen monosulfide is nonlinear while that for berylium bromide is linear.

2007-05-13 20:57:21 · 1 answers · asked by love2nnelly 1

2007-05-13 20:54:01 · 2 answers · asked by love2nnelly 1

in the separation of zinc and iron:
add 5drops of 5% thioacetamide and heat the mixture in a hot water bath. then, add 6 M HCl to the precipitate until it dissolves. after that, heat the solution, then neutralize it with 6 M NH3 (ammonia). also, add 10 drops of 1 M HCl before adding 5 drops of 0.1 M K4Fe(CN)6.

why do we need to add 10 drops of 1 M HCl when we already added 6 M HCl and neutralized it?

thanks! :)

2007-05-13 20:28:34 · 2 answers · asked by piangpiang 2

2007-05-13 19:34:34 · 11 answers · asked by aismi87 2

how..? give me true reason...

thank you..

2007-05-13 19:27:39 · 11 answers · asked by Anonymous

they lower the activation energy of biological reactions. or they increase the tempreture of biological reactions to speed them up, or they act as biological catalysts, or they are highly specific in their catalytic activity

2007-05-13 18:14:54 · 5 answers · asked by Anonymous

NaHCO3
KOH
NH3
NaOH
all of the above

2007-05-13 18:03:25 · 1 answers · asked by TinaMarie 1

2007-05-13 17:28:30 · 3 answers · asked by Anonymous