Chemistry - June 2007

We are using x-ray diffraction to search for ammonium sulfide on polycarbonate filters which we use to test the air. Unfortunately, when running a blank, we found a peak exactly where ammonium sulfide would have a peak. Can anyone offer any insight? Please give as detailed an answer as possible.

2007-06-06 07:31:47 · 1 answers · asked by D 2

Whats the Molecular formula for the following?

1,1,4-trimethylhexane

2,5-diheptane

2-ethyl-5-methylhexane

3,6-dimethylheptane

2007-06-06 07:31:24 · 3 answers · asked by Anonymous

Thankx.

2007-06-06 07:29:16 · 2 answers · asked by o.0 2

The addition of water to ethylene has become a cheaper method than fermentation for making ____.

a.ethanol
b.acetic acid
c.methane
d.ethylene glycol
e.diethyl ether

2007-06-06 07:26:20 · 3 answers · asked by Anonymous

What is the balanced chemical equation for the combustion of 2-methyl-1-butene?

a.C6H12(g) + 9 O2(g) → 6 CO2(g) + 6 H2O(λ)
b.C4H8(g) + 6 O2(g) → 4 CO2(g) + 4 H2O(λ)
c.2 C5H10(g) + 15 O2(g) → 10 CO2(g) + 10 H2O(λ)
d.2 C4H10(g) + 13 O2(g) → 8 CO2(g) + 10 H2O(λ)
e.C5H12(g) + 13 O2(g) → 5 CO2 (g) + 6 H2O(λ)

2007-06-06 07:25:03 · 3 answers · asked by Anonymous

What is the chemical formula for the following:

cis-1-methyl-2-pentene

trans-2-hexene

cis-4-hexene

trans-1-methyl-2-propylethylene

1-methyl-2-pentene

2007-06-06 07:22:53 · 3 answers · asked by Anonymous

very breifly, please. THanks! :D

2007-06-06 07:19:00 · 3 answers · asked by becky c 2

Compounds from which class usually have offensive odors, such as that of decaying meat or bad breath?

a.ethers
b.esters
c.ketones
d.alcohols
e.amines

2007-06-06 07:16:04 · 2 answers · asked by Anonymous

% ionization

2007-06-06 07:14:33 · 2 answers · asked by porkchop923 2

2007-06-06 07:13:49 · 1 answers · asked by Hooman 1

An unsaturated hydrocarbon is

a.a cycloalkane with five or more carbons.

b.a hydrocarbon that contains oxygen.
c.a hydrocarbon that is a gas at room temperature.

d.a compound in which all carbon atoms have four single bonds.

e.a compound in which one or more carbon atoms have double or triple bonds.

2007-06-06 07:13:38 · 3 answers · asked by Anonymous

The process of cracking, which occurs in the refining of petroleum, is

a.the method used to make oxygenated fuels.
b.the method by which hydrocarbons are separated.
c.the fragmenting of longer chain hydrocarbons to smaller units.
d.the method used to make higher boiling point hydrocarbons.
e.the method used to eliminate double or triple bonds.

2007-06-06 07:02:57 · 4 answers · asked by Anonymous

2007-06-06 06:59:23 · 4 answers · asked by tyler a 1

Which of the following hydrocarbons can have cis and trans isomers?

a.2-pentyne
b.3-hexene
c.1-butene
d.propene
e.2-ethylbutane

2007-06-06 06:59:02 · 3 answers · asked by Anonymous

For instance, if I had 'Cs' and 'Si' how would I figure out if they are ionic or covalent?

2007-06-06 06:58:11 · 2 answers · asked by K 2

What is the product of the hydrogenation of trans-2-pentene?

a.2,3-dihydroxypentane
b.2-pentyne
c.cis-2-pentene
d.2-hydroxypentane
e.pentane

2007-06-06 06:57:29 · 2 answers · asked by Anonymous

For instance, if I had 'Ca and F' and 'N and C', how do I tell which they are?

2007-06-06 06:56:30 · 4 answers · asked by K 2

Which one of the following functional groups is a base?

a.alcohol
b.amine
c.ether
d.carboxylic acid
e.ketone

2007-06-06 06:54:10 · 4 answers · asked by Anonymous

The solubility product constant for K2PdCl6 is 6.0 x 10^-6 (K2PdCl6 --><-- 2k+ + PdCl6 2-). What is the K+ concentration of a solution prepared by mixing 50.0 mL of a 0.400 M KCl with 50.0 mL of 0.100 M PdCl6 2-?

I have the entire problem worked out since a teacher gave it to me but am not understanding why they are doing some of the things they are doing. Once you find the moles of K+ from KCl by multiplying molarity times volume, it is confusing me as to what happens afterwards.

2007-06-06 06:47:46 · 1 answers · asked by ScienceNut 2

Propene + Bromine [water] = ????

C(3)H(6) + Br(2) = ????

thanks

2007-06-06 06:37:00 · 7 answers · asked by Anonymous

2007-06-06 06:33:24 · 5 answers · asked by LIL J 2

2007-06-06 06:21:04 · 2 answers · asked by tyler a 1

Exam #2
12. Given the reaction 2NH3 (g) + 3Cl2(g) --- N2(g) + 6HCl (g), you react 5.0-L of NH3 with 5.0-L of Cl2 measured at the same conditions in a closed container. Calculate the ratio of pressures in the container. (Pfinal / P initial - this tip was given by the prof.)

2007-06-06 06:15:37 · 4 answers · asked by olispora 2

at STP what is the mass of 22.4L of hydrogen gas.
how would you do this problem?

2007-06-06 06:07:49 · 5 answers · asked by ? 2

Okay, I'm gonna sound like a chemistry nerd for this it here it goes. I heard you can make copper II hydoxide by doing electrolysis on water with copper electrodes. I also heard that you can increase the conductivity by adding baking soda but not salt becuase this would introduce chlorine
Other websites tell me that if you do electrolysis on saltwater you get copper chloride becuase you introduced chlorine but, then woudn't you get the copper chloride AND copper II hydroxide? How do you only get one? I'm confused.

2007-06-06 06:00:05 · 2 answers · asked by mexicanonfire 3

volume of base = 25cm^3 Average titre = 22.5cm^3
Base= Na2CO3 (hydrated) Acid= HCl (0.1 mol/ dm^3)

If 7.8 g/dm^3 Na2CO3 solution was used as base,
-calculate the number of moles of water of crystallization of the Na2CO3.
(Na=23, C=12, O=6 H=1 Cl=35.5)

2007-06-06 05:36:53 · 2 answers · asked by Prince N 2

In a chemistry experiment, a solution of hydrolic acid is to be kept between 30 degrees C and 35 degrees C, that is C is greater than or equal to 30 and less than or equal to 35.

What is the range in temperature in degrees F if the C-F conversion formula is:

C = 5/9(F-32)

pls put or explain the solution...
pls help me...

2007-06-06 03:39:36 · 5 answers · asked by sweet_candy 2

i need help on this MCQ question on ideal gas law.. i have tried for 30 mins but cant seem to work it out..Hope someone can help me . thanks alot

In an experiment, 0.30g of the volatile liquid Q formed 0.025 dm3 of vapour at 100C and at atmospheric pressure. What is the relative molecular mass of Q? [ Assume 1 mol of vapour occupies 22.4dm3 at s.t.p]
A. (0.025 X 273 X 22.4) divide by (0.30 X 373)
B.(0.025 X 373 X 22.4) divide by (0.30 by 273)
C. (0.30 X 273 X 22.4 ) divide by (0.025 X 373 )
D. (0.30 X 373 X 22.4) divide by (0.025 X 273)

My approach to this question was using pV=nRt, R and t were constant..thats why V1 divide by n1t1 = V2 divide by n2t2
But i dont know how to proceed further since i duno how to find V1

2007-06-06 03:23:05 · 1 answers · asked by Anonymous

2007-06-06 03:14:20 · 6 answers · asked by wilsonwalden58 1

A. acid
B. base
C. fire
D. salt

2007-06-06 02:23:43 · 10 answers · asked by Mo 1