Chemistry - October 2006

(Low-Density Polyethylene Plastics) LDPEs to be specific..

2006-10-24 19:37:28 · 3 answers · asked by avon_manu1009 2

I've figured out how many moles I am dealing with, now I need to determine the total pressure of the container when there are 1.025 mol and the volume of the container is 5.00 L and the temperature is 19degrees celsius (which I will need to convert to Kelvin). Being I am looking for pressure, would I be solving for p? Oh and how do I convert celsius to kelvin again?

2006-10-24 19:29:33 · 3 answers · asked by D 2

2006-10-24 19:23:55 · 1 answers · asked by cheezzznitz 5

2006-10-24 19:21:44 · 1 answers · asked by cheezzznitz 5

Like find the ionic concentrations of, let's say, Na2 or CO3

2006-10-24 19:18:13 · 1 answers · asked by cheezzznitz 5

Of the reaction HCL + Na2CO3 --> ????
It is equimolar.

Please list ionic products from the least to greatest concentration?

2006-10-24 19:17:08 · 1 answers · asked by cheezzznitz 5

Ti3+ + HOBr <===> TiO2+ + Br¯ (in acid solution)

(a) Write the correctly balanced half-reaction and net ionic equation for the skeletal equation shown above.

Ti3+ + H2O ---> TiO2+ + 2 H+ + e¯

H+ + HOBr + 2e¯ ---> Br¯ + H2O

2 Ti3+ + HOBr + H2O ---> 2 TiO2+ + 3 H+ + Br¯

(b) Identify the oxidizing agent and the reducing agent in this reaction.

HOBr is the oxidizing agent and Ti3+ is the reducing agent.
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My question: The resulting Br- precipitates with silver nitrate. The final precipitate is 2.504 grams. What is the initial concentration of HOBr if initial solution is .5 liters?

2006-10-24 19:13:15 · 1 answers · asked by cheezzznitz 5

2006-10-24 19:09:26 · 4 answers · asked by VeNom 1

2006-10-24 19:06:57 · 1 answers · asked by cheezzznitz 5

I was able to determine for oxygen, as it's only 1, but carbon dioxide is two elements. I am needing to convert 1.1 grams of carbon dioxide to moles. Part of my problem was converting 16.0 grams of oxygen to moles, which was determined to be 1 (I hope).

2006-10-24 19:06:09 · 4 answers · asked by D 2

How many g of Na3PO4 is produced by 75.7g of H3PO4?

2006-10-24 19:05:06 · 4 answers · asked by noodlenmac0329 2

A 3.00 g sample of an alloy (containing only Pb and Sn) was dissolved in nitric acid (HNO3). Sulfuric acid was added to this solution, which precipitated 2.93 g of PbSO4. Assuming that all of the lead was precipitated, what is the precentage of Sn in the sample?

2006-10-24 18:44:02 · 5 answers · asked by kruzzz80 2

2006-10-24 18:33:07 · 6 answers · asked by Nikki H 1

2006-10-24 17:50:48 · 6 answers · asked by Jacqueline 2

A sample of 4.00 g of methane os mixed with15.0 grams of chlorine determine the limiting reactant according to the chem equa : CH4+4Cl2->CCl4+4HCl
what is the max mass of CCl4 that can be formed

2006-10-24 17:25:07 · 3 answers · asked by coolpuffin 2

I know the four factors (nature of reactant, concentration& surface area, temperature, and catalyst) that may have an impact on systems at equilibrium, but I can’t answer the three below questions.

1. Which three of these factors can cause equilibrium shifts?
2. Which one of the factors can both cause equilibrium shifts and change the value of the equilibrium constant?
3. Which one of these factors can neither change the value of the constant nor cause equilibrium shifts?

2006-10-24 17:17:40 · 1 answers · asked by Kameliya 2

I know how a galvanic cell works, and I know that Lithium is a Group1 metal with oxidation states of 0 or +1. That doesn't tell me what ions and salts are in a "Lithium Ion" battery, though. (specifically: cell phone battery)

2006-10-24 17:04:25 · 3 answers · asked by SmartoGuy 3

What are the coefficients in front of BrO^- (aq) and Br^- (aq) when the following
equation is balanced in an acidic solution:
___ BrO^- (aq) + ___ Br^- (aq) ___ Br2 (aq)?

(answer) 1, 5)

2006-10-24 15:58:42 · 3 answers · asked by kpham 1

2006-10-24 15:40:03 · 9 answers · asked by ashymoto 1

(a) 0.20 M CH3NH2 (Kb = 4.40 10-4) with 0.20 M HCl
pH at equivalence point?

(b) 0.50 M HI with 0.10 M KOH
pH at equivalence point

2006-10-24 15:37:45 · 2 answers · asked by Lauren 1

What/How do u draw the lewis diagram of OXAPROZIN?????
Chem Formula: C18H15NO3


P.s. Itz very Urgent!!

2006-10-24 15:15:11 · 5 answers · asked by Simply Simple 1

Iodine and Bromine react to give Ibr

I2 + Br2 <---------> 2IBr

What is the equilibrium composition of a mixture that initially contained .0015 mol each of iodine and bromine in a 5.0 L vessel. K=1.2 x 10*2

I and Br=.0003 mol

[2x]*2
[.0003-x]*2 = 120

Square root that….
2x/.0003-x = 10.95

Solve for x= 3.67 x 10*4

The correct answer is

I and Br at equil = 4.7 x 10*-5

What did I Miss the boat on? I know its hard to try to understand my work on this thing but please help.

2006-10-24 15:07:12 · 3 answers · asked by cassandracorrao 3

and how do you recognize the molecular shape by looking at the lewis structure. and how do you recognize the where the net dipole exists?

2006-10-24 14:59:48 · 7 answers · asked by Anonymous

I'm just curious, 'cause I seem to get canker sores a LOT for no resaon, and I think maybe my saliva is a little more acidic than normal. I just want to compare my saliva's Ph to normal (I'm probably going to do some type of litmus test, I think, I'm not quite sure, but I'll know when I see it, lol!)

2006-10-24 14:42:20 · 6 answers · asked by T.J. 2

the university i'm planning to go to only offers Zoology as a biomedical science. I want to major in Biochemistry which gives me a Bachelor of Science in Biochemistry, but it didn't say it was a biomedical science. Would it be better to major in biochm or zoology if i want to go to med school?

2006-10-24 14:35:52 · 8 answers · asked by blue_bee 4

2006-10-24 14:30:41 · 2 answers · asked by glittereyezgirl 1

2006-10-24 14:29:43 · 4 answers · asked by glittereyezgirl 1

2006-10-24 14:29:12 · 11 answers · asked by glittereyezgirl 1

Components must be recovered in their dry, solid state. Alcohol, beakers, hot plate, filter paper, distilled water, stirring rods, funnels, ice, colander, and additional requested items may be used.

2006-10-24 14:23:21 · 4 answers · asked by Rachel - 1

2006-10-24 14:05:01 · 6 answers · asked by summer 1