Chemistry - May 2007

2007-05-21 05:43:56 · 5 answers · asked by Shepherd 1

tracheae
bronchioles
bronchi
alevoli

2007-05-21 05:42:37 · 5 answers · asked by Anonymous

in this equilibria:-

Cl2(aq) + H2O(l) ---reversible-->< Cl-(aq) + HOCl(aq) + H+(aq)

2007-05-21 05:20:29 · 3 answers · asked by Anonymous

48.5211g= _ kilograms
19.7254g=_ kilograms
21.3573= __kilograms
48.47=__ kilograms
21.35=__ kilograms

2007-05-21 03:59:04 · 10 answers · asked by Anonymous

2007-05-21 01:44:15 · 10 answers · asked by Punkin 1

1)How many liters of water can be made from 34 grams of oxygen gas and 6.0 grams of hydrogen gas at STP? What is the limiting reactant for this reaction?

2007-05-20 22:36:23 · 3 answers · asked by Joesph P 1

2007-05-20 22:04:55 · 3 answers · asked by Ng C 1

my zippo lighter is out of gas and i have a butane fuel.. is it gonna work or is it gonna like explode? :(

2007-05-20 21:29:52 · 3 answers · asked by popcorn 1

...as chemicals result or some others incredible chemicals result Thanks...

2007-05-20 21:02:59 · 7 answers · asked by Ommy 1

thanks!

2007-05-20 19:22:48 · 4 answers · asked by Anonymous

2007-05-20 16:52:44 · 6 answers · asked by Kevin 1

When writing quantom numbers for elements how do I know when "n" (The Principal Quantum Number) should go from 1 to 2 to 3 etc.. and how do I know what Ml (The Magnetic Quantum Number) should be depending on what and "l" are?

Also, how do I know how many electrons can occupy an orbital represented by something like n=2, l=1, ml=-1?

2007-05-20 16:17:02 · 5 answers · asked by JMEB 2

Question:

Can someone please tell me how each of the following changes would affect the amount of the specified substance recovered?


1. the recovery of CaCO3 was attempted by adding 3M H2SO4 instead of 3M HCl to the SiO2 / CaCO3 residue

2. the recovery of CaCO3 was attempted by adding 1M KNO3 solution instead of 1M K2CO3 solution to the filtrate, containing aqueous CaCl2


I also have to write a double displacement reaction that occurs between each of the reagents.

Thanks in advance.

2007-05-20 16:03:35 · 2 answers · asked by gym guy 2

when i add steel wool into the copper(II) sulfate pentahydrate solution, it turns into pinkish red and then break down into tiny particles (greyish colour) as i stir it.
when the solution is pour down into a filter paper, the residue is believed to be copper and the solution that is filtered is iron sulfate.

can anyone explain why the metal displacement take place??
why the residue is copper and why iron sulfate is formed?

2007-05-20 15:55:04 · 3 answers · asked by Labuuu* 1

Nitrogen dioxide gas reacts with hydrogen gas producing ammonia gas, water vapor and releases 100kJ of heat. The chemical carbon tetrachloride served as a catalyst for the reaction.

1. Write and balance chemical reaction described above using the smallest whole-numer coefficients. Be sure to include the heat and the catalyst in the balanced equation.

2. If 23.0g of Nitrogen Dioxide gas reacts with excess hydrogen gas, how many grams of water vapor are produced?

3. What does the carbon tetracloride do?



Thank you for the help

2007-05-20 15:51:04 · 4 answers · asked by Bowler 1

What mass of Mg is formed by passing a current of 7.80 A through molten MgCl2 for 4.00 days?

2007-05-20 15:20:01 · 1 answers · asked by Superman 1

Hi, is anyone there knows about the glue tape? I am looking some patent to understand more. Please let me know if you have the info. Very appreciate that.

2007-05-20 14:54:14 · 2 answers · asked by stevenfoong 1

What makes electricity flow, whats the efect of electricity flowing, and how it becomes static.

2007-05-20 14:25:48 · 1 answers · asked by Luna 2

2007-05-20 13:59:12 · 4 answers · asked by rsmvp25 1

2007-05-20 13:10:01 · 2 answers · asked by Disney Fanatic 1

in simple words as possible please....

2007-05-20 13:06:24 · 5 answers · asked by Anonymous

a crystal necklace with a blue liquid inside conatining 0.25 grams of silver (Ag) per 100 ml of solution. What is the molarity of this blue liquid?

2007-05-20 12:28:47 · 1 answers · asked by rose_red_91 2

can u please give me the name??

2007-05-20 12:27:18 · 5 answers · asked by Anonymous

2007-05-20 12:20:52 · 2 answers · asked by Anonymous

An unknown liquid inside a metal sylinder contain 0.84 grams of Lead(II)Chloride (PbCl2) per 100 ml of solution. what is its molarity?

2007-05-20 12:13:18 · 1 answers · asked by rose_red_91 2

2007-05-20 12:11:00 · 3 answers · asked by Anonymous

excited atoms of a particular element?

i tried finding this but could not. PLEASE HELP!

2007-05-20 12:04:35 · 1 answers · asked by imputh 5

please help me out i need to have some research for my science project, and if u can/want to post a link to any sites you know of that can help me out...GREAT. And also, so far i can see that out of my substances {Bleech,Diet Coke,Windex,tap water,or fabric softener}, the tap water has had the most effect, then Diet Coke.
so PLEASE help me out to the best of your ability... THX

2007-05-20 11:52:09 · 4 answers · asked by Fallen AngeL 1

At equilibrium a mixture of N2, H2, NH3 gas at 500 degrees celsius is determined to consist of 0.630 mol/L of N2, 0.397 mol/L of H2 and 0.136 mol/L of NH3.
What is the equilibrium constant for the reaction.

N2 (g) + 3 H2 (g) <=> 2 NH3 (g)

at this temperature?

2007-05-20 11:24:32 · 2 answers · asked by nikki 1

Fe (s) + NO3- (aq) ---> Fe3+ (aq) + N2O (g)

This occurs in basic solution and water can be added wherever necessary.

2007-05-20 11:22:45 · 1 answers · asked by strawberriitwist 2