Chemistry - March 2007

Most explanations of mathematical calculations for best answer please. Thank you.

2007-03-26 16:26:46 · 2 answers · asked by Anonymous

Balance the following equation by the half-reaction method in an acidic or basic solution as indicated.


Cl2 + IO3 - --> IO4- + Cl - ( basic )

2007-03-26 16:17:26 · 1 answers · asked by guitarx313 1

Which of the below statements a) through f) are true?


For statements a) through d) use the following reaction:


Cu(s) + 2Ag+(aq) --> 2Ag(s) + Cu2+(aq)

a) Cu is the oxidizing agent

b) Ag+ is the oxidizing agent

c) Cu is reduced

d) Ag+ is reduced





e) HCl(g) + NH3(g) --> NH4Cl(s) is a redox reaction

f) Cr2O72-(aq) + 2OH-(aq) --> 2CrO42-(aq) + H2O(l) is a redox reaction

2007-03-26 16:16:56 · 3 answers · asked by guitarx313 1

Which of the following are oxidizing agents ?



a) HNO3


b) Na


c) Al


d) Cr


e) C

2007-03-26 16:16:21 · 1 answers · asked by guitarx313 1

In a mixture of Cl2 and O2 gases, the partial pressure of Cl2 is 0.195 atm. The total pressure is 0.455 atm. The temperature is 34.0oC. If the total volume of the gas mixture is 412 mL, what is the mass of O2 in grams

2007-03-26 16:14:14 · 4 answers · asked by jeniferrrr 1

At room temperature a 0.0100 M ammonia solution was 4.1% ionized. Calculate conc of hydroxide, ammonium ion and hydronium ions.

The best explanation and working will receive the best answer. Thank you.

2007-03-26 16:10:01 · 1 answers · asked by Anonymous

2007-03-26 16:05:43 · 1 answers · asked by Anonymous

please help me, i have dis project due in few days about dis topic help me. If You Help Me I'll give u a cookie!!

2007-03-26 15:55:02 · 4 answers · asked by Azn Person 1

2007-03-26 15:52:42 · 1 answers · asked by dem boyz 2

Cu + NO3- --> Cu2+ + NO ( acidic )

2007-03-26 15:35:35 · 2 answers · asked by simonkf2002 1

2007-03-26 15:31:41 · 3 answers · asked by Anonymous

a) H2O2


b) K


c) Al


d) Cr


e) C

2007-03-26 15:31:19 · 1 answers · asked by Dd 1

i need chem homework help. please

2007-03-26 15:29:52 · 1 answers · asked by Anonymous

i need chem homework help. please

2007-03-26 15:29:21 · 1 answers · asked by Anonymous

Given the following conditions for an ideal gas, what is the number of moles of gas ?


P = 650 torr

V = 972 mL

T = 42.0 oC

2007-03-26 15:16:51 · 1 answers · asked by Holden Caulfield 1

In a mixture of O2 and Ne gases, the partial pressure of O2 is 0.195 atm. The total pressure is 0.425 atm. The temperature is 38.0oC. If the total volume of the gas mixture is 277 mL, what is the mass of Ne in grams?

2007-03-26 15:14:20 · 1 answers · asked by Holden Caulfield 1

type of that waste(name) and its composition.
how the way its hazard to human or environment?

2007-03-26 15:03:22 · 1 answers · asked by fraa 1

2007-03-26 14:44:38 · 1 answers · asked by dero 1

I have no idea how to start solving this...

I need to find the pH of solution A and C.
You don't need to know the identity of X, except that the X in solution A is the same as in solution B.
All solutions are at 25°C.

Solution A is 50.0 mL of a 0.150 M solution of the weak monoprotic acid HX.
Solution B is a 0.0500 M solution of the salt NaX. It has a pH of 10.65.
Solution C is made by adding 15.0 mL of 0.250 M KOH to solution A.

Please help, thank you! :)

2007-03-26 14:41:19 · 2 answers · asked by protege moi 3

cooled to 0deg C

2007-03-26 14:36:36 · 4 answers · asked by Kayla H 1

Testing various samples of stuff.. like plants.. i need help! i'm open to anything.

2007-03-26 14:16:18 · 6 answers · asked by bubbles7070 2

Since lithium is in period two does that mean it has 2 outer electrons, if not wat does period two mean and also what would group one mean for an element????thanks-

2007-03-26 14:12:49 · 13 answers · asked by Anonymous

complete in 40 minutes. Calculate the value of the rate constant (in L/min mol)

2007-03-26 14:07:35 · 2 answers · asked by Kayla H 1

2007-03-26 14:06:03 · 2 answers · asked by hahree 4

water to the initial rate of disappearance of oxygen

2007-03-26 14:04:54 · 1 answers · asked by Kayla H 1

KCl
HNO3
CCl4
NaOH

2007-03-26 14:01:15 · 7 answers · asked by William R 1

To what temperature (in degrees Celsius) must a 37.6 L container filled with 1.13 moles of CO2 be heated to obtain a pressure of 1.3 atm? You do not need to type in the units for degrees Celsius.

2007-03-26 14:00:37 · 2 answers · asked by Helen 1

Pure benzene freezes at 5.444 deg C and has a value for the molal freezing point depression constant of Kf of 5.12 C/m. What is the molar mass of thyroxine?

2007-03-26 13:58:35 · 2 answers · asked by Kayla H 1

How would you distinguish the following alcohols from each other using reaction chemistry?

CH3CH(OH)CH(CH3)CH3
(3-methyl-butanol) (IUPAC)



CH3CH(OH)CH=CH2
(3-buten-2-ol) (IUPAC)

I know that they are both secondary alcohols. But that doesn't help me when using the Lucas Test. Would I add a reaction like Br2 to distinguish the two from one another? What would the preferred products be? Thanks for looking at this.

2007-03-26 13:58:03 · 3 answers · asked by Kristin H 1

Need an example how to do this ...please help...thanks

What is the pressure inside a 55.0 L container filled with 0.698 moles of N2 at 60.3 °C?

2007-03-26 13:50:49 · 3 answers · asked by Helen 1