Chemistry - March 2007

a. N2 and 3H2 are the reactants and 2NH3 is the product
b. N2 is the product and 2NH3 and 3H2 are the reactants
c. 3H2 is the reactant and 2NH3 and N2 are the products
d. N2 and 3H3 are the products and 2NH3 is the reactant.
????
thanx.

2007-03-22 13:48:42 · 3 answers · asked by Anonymous

2007-03-22 13:43:21 · 1 answers · asked by Anonymous

Because I have to research an isotope and write an essay on it, and I had chosen Hydrogen. People have said yes it is, but others have said no. It has it's own isotopes within it, so does that mean it is one too?!? Please help this is due tomorrow!

2007-03-22 13:38:42 · 6 answers · asked by Trisha 4

a) [ Q ] > [ QH + ]
b) [ QH + ] > [ Q ]
c) [ Q ] = [ QH + ]

Using the letters for the above relationships identify the dominant quinine species for each of the following steps of the above titration.

I. At the start of the titration
II. At the halfway-point
III. At the equivalence point

2007-03-22 13:35:59 · 1 answers · asked by Paul C 1

please reffer at colours , type of reaction , why it is a redox reaction , this is what i think it is , but i have problems expressing in english

2007-03-22 13:35:07 · 2 answers · asked by sweetnightmare 1

If this is titrated with 0.200 M HCl, what is the pH half-way to the stoichiometric point ? What is the pH at the stochiometric point? Quinine is monobasic with Kb = 7.90 x 10-6.

2007-03-22 13:33:33 · 1 answers · asked by Paul C 1

made by combining 0.500 L of 0.240 M HC3H5O2 ( Ka = 1.30 x 10-5 ) and 0.500 L of 0.240 M NaC3H5O2.

2007-03-22 13:30:16 · 1 answers · asked by Paul C 1

2007-03-22 13:23:40 · 2 answers · asked by Anonymous

I am not understanding the process of balancing equations. Can someone please help me???


1.) Na(subscript 2)O(subscript 2) + H(subscript 2)O *arrow* NaOH + O(subscript 2)

2.) H(subscript 3)BO(subscript 3) *arrow* H(subscript 4)B(subscript 6)O(subscript 11) + H(subscript 2)O

3.) FeS(subscript 2) + O(subscript 2) *arrow* Fe(subscript 2)O(subscript 3) + SO(subscript 2)

4.) C(subscript 3)H(subscript 8) + O(subscript 2) *arrow* CO(subscript 2) + H(subscript 2)O

2007-03-22 13:22:50 · 3 answers · asked by lilprincess_2good4u 1

ok so im freaking out because im supposed to do a lab that i was away for. and i was supposed to copy the answers off somebody else in my class, but their answers were wrong, now im freaking out even more because its supposed to be like the only thing that goes on my midterm! someone pleaseeee help me... the chemical formula i had was CaCl2=NaCO3=CaCO3+NaCl, but this is impossible to balance. the only information i got was that calcium chloride and sodium were miixed together to create and turned a milky white colour, after a percipitate was formed in the liquid... someone please help me find the correct equation. PLEASE! thank you

2007-03-22 13:22:20 · 3 answers · asked by Anonymous

2007-03-22 13:22:00 · 2 answers · asked by Anonymous

2007-03-22 13:18:59 · 5 answers · asked by theresa e 1

These are the eletrons for some atoms. How many electrons will these atoms gain or lose to become stable?
rubidium(37)
argon(18)
sodium(11)
helium(2)
francium(87)
radon(86)
astatine(85)
bromine(35)
xanon(54)
neon(10)
lithium(3)
krypton(36)
cesium(55)
iodine(53)
boron(5)
chlorine(17)
flourine(9)
potassium(19)

any help would definately be appreciated, and please explain on how you found this out.

2007-03-22 12:56:16 · 3 answers · asked by TheGreatest 3

What is the pH of a regular can of coke?

What is the pH of Arm & Hammer Baking Soda?
(The thing itself, not what pH it causes!!)

Please cite an internet source

2007-03-22 12:55:21 · 2 answers · asked by ccjcjl 2

2007-03-22 12:54:23 · 3 answers · asked by asphenry 1

It is once agani for science olympiad. PLEASE HELP!

2007-03-22 12:53:41 · 1 answers · asked by rajavision108 2

2007-03-22 12:50:34 · 1 answers · asked by Anonymous

2007-03-22 12:40:36 · 9 answers · asked by bouncy_tigger 1

2007-03-22 12:34:32 · 2 answers · asked by rajavision108 2

In my book it says the same for both. is there even a difference?

2007-03-22 12:32:20 · 2 answers · asked by barnacle 2

i need answer quick and before tommorow and please no dumb answers.

2007-03-22 12:31:11 · 4 answers · asked by Anonymous

After heating solid naphthalene to convert it to a liquid, an element is then dissolved in the naphthalene. If the Kf of naphthalene is 6.9 K/mc, its freezing point is 80 C, and its mass is 7 grams. And if the element's freezing point is 70 C and its mass is 0.6 grams, how would you calculate the element's molecular mass?

2007-03-22 12:23:29 · 1 answers · asked by Obser V 1

i don't know to do this question....the answer is 3.34X10^25 molecules.

2007-03-22 12:21:08 · 2 answers · asked by no name 1

When the formula mass of a compound is expressed in grams it is known as ... A) compound mass B) molarmass C) gram-atomic weight D) gram ionic mass


The sum of the atomic masses of all the atoms in a formula for a compound would most properly be called the ...................
A) molecular mass B) formula mass
C) atomic mass D) actual mass


the term formula mass is a general term that can be applied to both ionic compounds and molecular compounds because
A) ionic compounds exist as individual molecules
B) molecular formulas are always emperical formulas
C) not all formulas represent individual molecules
D) molecular forrmulas are always LEwis formulas

2007-03-22 12:19:32 · 2 answers · asked by asdf123 1

Ok, here is another answer that I need rather quickly, scientific I should add. My 4th grader has a science project due tomorrow. We have tested 3 samples and found that a nail placed in plain distilled water rusted, but the nail placed in salted distilled water did not. The trouble is, we can not find scientific data to support the findings. Please help!!! Oh, we understand why the nail rusted in the plain water, but we don't understand the science behind the salt watered nail seeming untouched.

2007-03-22 12:16:14 · 4 answers · asked by dareu2000 2

P = 651 torr

V = 962 mL

T = 41.5 oC

Enter a numeric answer only. Please help, thank you.

2007-03-22 12:06:02 · 1 answers · asked by peterdk86 1

P = 651 torr

V = 962 mL

T = 41.5 oC

Enter a numeric answer only. Please help, thank you.

2007-03-22 12:02:57 · 1 answers · asked by peterdk86 1

P = 651 torr

V = 962 mL

T = 41.5 oC

Enter a numeric answer only. Please help, thank you.

2007-03-22 12:02:00 · 2 answers · asked by peterdk86 1

formation, combustion,decomposition, single replacement or double replacement. also what are the names of compunds in each reaction and indicate if they are ionic, molecular, an acid or a base.

1. 2 NaNO3 subscript (s) ----- 2NaO2 subscript (s) + O2 subsript(g)

2 .Cu + Ag2 subscript SO4subscript ----- CuSO4subscript + 2Ag

i am having difficulty with these sort of questions please solve these so I can find my mistakes.

2007-03-22 11:36:14 · 2 answers · asked by Anonymous

I need a simplified answer please.. i am not good enough to mess with formulas or whatnot... just need to know if there is any household things i can use.. and please have a source of some kind so i dont blow my hands off.. :) heh

2007-03-22 11:30:41 · 1 answers · asked by Anonymous