Chemistry - November 2006

is it...
3.01g,
11g,
72.6g, or
59.3

2006-11-19 12:41:11 · 1 answers · asked by Anonymous

Consider the reaction: NH3 + O2 → NO + H2O

A) How many grams of NO are produced from the complete reaction of 160.00 g of O2 ?

B) If the percent yield of this above reaction is found to be 92.98 %, how many grams of NO are actually produced ?

...thank you very much for your time :)

2006-11-19 12:41:00 · 2 answers · asked by lnklike 1

2006-11-19 12:27:57 · 8 answers · asked by jordc127 1

2006-11-19 11:40:43 · 3 answers · asked by Anonymous

i am totally failing chemistry. how do i pass? what do i need to know? and dont say study and take notes. i am already doing that. and i have already stayed after school to get help. it doesnt work. i have no idea whats going on in that classroom. everything the teacher says is a foreign language to me. i am so lost! help!

2006-11-19 11:26:00 · 11 answers · asked by emo girl 3

how is the concept of electron density used to describe the position of an electron int eh quantum mechanical treatment of an atom?

2006-11-19 11:24:03 · 1 answers · asked by avalentin911 2

2006-11-19 11:21:06 · 3 answers · asked by beaner 1

2006-11-19 11:15:42 · 6 answers · asked by Lexi U 1

for the following reaction, Kp=3.5E4 at 1495k
given equation H2+Br2>2HBr

what is the value of Kp for the following reaction at 1495k
(a)HBr>1/2(H2)+1/2(Br2)
(b)2HBr (c)1/2(H2)+1/2Br2>HBr

2006-11-19 11:06:26 · 2 answers · asked by smile 1

Determine the OH, pH and pOH of a solution with a H concentration of 4.2 * 10(-9)M
Thanks everyone for your help!!

2006-11-19 11:00:36 · 5 answers · asked by Anonymous

2006-11-19 10:49:02 · 1 answers · asked by diana m 1

2006-11-19 10:45:49 · 2 answers · asked by diana m 1

please be specific and include source

2006-11-19 10:32:10 · 5 answers · asked by alex d 1

If sugar as we know, is a food . how is it that we can use it as a preservative in fruit and jams etc. What is going on

2006-11-19 10:10:34 · 3 answers · asked by Anonymous

20) Which molecule is nonpolar and has a synnnetrical shape?
A) NH3
B) CH4
C) H20
D) HCI

24)Which type of bond exists in a molecule of hydrogen iodide?
A)a polar covalent bond with an electronegativity difference ofzero
B)a polar covalent bond with an electronegativity difference between zero and 1.7
C)a nonpolar covalent bond with an electronegativity difference between zero and 1.7
D) a nonpolar covalent bond with an electronegativity difference ofzero

25)Which compound has the greatest possible number of isomers?
A) ethane B) pentane C) butane D) propane

27)Which combination of atoms can form a polar covalent bond?
A) Na and Br B) N and N C) H and Br
D) H and H

28) What is the total number of pairs of electrons represented by dashes (-) in the structural formula H- C _=_ C - H ? between the two C's it is a Triple line.
A) 10
B) 4
C) 5
D) 8

29)Which compound is'a synthetic polymer?
A) cellulose B) nylon C) protein D) starch

2006-11-19 10:09:08 · 2 answers · asked by James O 1

Question Details:CO2(g) + H2(g) ↔ H2O(g) + CO(g) When H2(g) is mixed with CO2(g) at 2,000 K, equilib­rium is achieved according to the equation above. [CO] = 0.385 M [H2O] = 0.385 M [H2] = 0.365 M [CO2] = 0.465 M And if it helps Kc = 0.87

2006-11-19 09:52:29 · 4 answers · asked by cheezzznitz 5

2006-11-19 09:46:24 · 7 answers · asked by annie 1

Can someone explain to me how to do Straight-weight Problems! I am doing chemistry and I can not figure it out. I just want someone to please break it down for me in a way I can understand it.... Thank you! I'll give you an example of the type of problems I am doing, but I am not asking for the answer just how to figure them out. Thank you!

How many grams of mercuric oxide are needed to produce 96 grams of oxygen?

How many liters of oxygen may be obtained by electrolysis of 900 grams of water?

What volume of sulfur dioxide is produced when 224 grams of sulfur are burned?

What weight of sulfuric acid must react with copper in order to produce 112 liters of sulfur dioxide? 490g

Thanks again!

2006-11-19 09:34:16 · 2 answers · asked by Anonymous

2006-11-19 09:32:52 · 5 answers · asked by Anonymous

what is its boiling and meltig point, # of neutrons and electrons,

2006-11-19 09:22:20 · 5 answers · asked by Anonymous

Which of the following molecules are IR active and why?
H2O, MeCN, Cl2, CH3Br

Is C triple bond C more likely to have a higher frequency than a C double bond C and again why?
(NOTE: Please answer thoroughly!! Thanks)

2006-11-19 09:14:21 · 2 answers · asked by saju_ahmed06 2

For homework, my teacher asked us to draw a molecular orbital diagram. He did not give us any specific details on what they are or how to draw one. Our textbook is completely void of any explanations that make any sense whatsoever. I was wondering if someone would take the time to help me out.

I AM NOT ASKING YOU TO DO MY HOMEWORK FOR ME, but just to help me out a little, explain what i am supposed to be doing so i can do my homework.

Any websites that you think would be helpful in explaining that would also be greatly appreciated.

2006-11-19 09:13:15 · 4 answers · asked by Anonymous

2006-11-19 09:11:07 · 1 answers · asked by cynthia c 1

2006-11-19 09:11:03 · 2 answers · asked by avalentin911 2

2006-11-19 09:07:16 · 5 answers · asked by curlash 1

Here is the question. If anyone knows the answer please tell me because I need the answers by tomorrow. Thanks!

Use the details of modern atomic theory to explain the following:
a. For the alkali metals, the ionic radius increases as atomic number increases.
b. The radius of the chlorine atom is smaller than the radius of the chloride ion.
c. The first ionization energy of aluminum is lower than the first ionization energy of magnesium.
d. For magnesium, the difference between the first and second ionization energies is much less than the difference between the second and third ionization energies.

2006-11-19 09:00:56 · 3 answers · asked by rachel 1

I have read the post about the chemical equation for making formalin, but I have been trying to come up with an actual working equation for mixing up my own formalin solutiuon from a 52% formaldehyde solution,100% methanol solution, and water. It never seems to come out right, I think there must be some sort of solubility issue that makes my equation invalid. Anyone have any suggestions?

2006-11-19 08:51:59 · 2 answers · asked by cadisfly74 1

2006-11-19 08:49:11 · 5 answers · asked by MaraAsta_Jedi 2

2006-11-19 08:43:11 · 1 answers · asked by soccawalka5 2

A) S-H
B) H-I
C) H-Cl
D) H-H
E) Br-H

2006-11-19 08:41:12 · 4 answers · asked by ruby 2