Chemistry - October 2006

2006-10-08 15:25:21 · 3 answers · asked by lia r 1

2006-10-08 15:05:54 · 3 answers · asked by brook 1

A. Calcium
B. Magnesium
C. Cesium
D. Sodium

2006-10-08 15:05:06 · 4 answers · asked by Ashley C 1

how do i ensure that an autograph in sharpie will last through a washer and dryer ? i got my favorite band to autograph my shirt and i want to wear it but i dont want it to go away i can survive if it fade ALITTLE but if theres anything i could put on it that would make fade less then please tell me .... even if its just wash it in cold water or wash it in warm water or air dry or put it in the dryer first then wash

2006-10-08 14:58:14 · 6 answers · asked by tildeathwilirock 1

2006-10-08 14:53:54 · 6 answers · asked by zach32 2

Do you know any websites or the steeps on how to do it.

2006-10-08 14:11:24 · 2 answers · asked by msnewbooty706 1

i live in new york city and everytime the water pools somewhere and dries, there will be red stuff left behind. not sure what it is? is it safe to drink? even after Brita filtering, the stuff is still there...

2006-10-08 14:03:33 · 7 answers · asked by Anonymous

a. lead fillings and iron fillings
b. sand and gravel
c. sand and finely ground plastic foam
d. salt and sugar
e. alcohol and water
f. nitrogen and oxygen

2006-10-08 13:44:42 · 3 answers · asked by disasterrrific 1

2006-10-08 13:36:33 · 6 answers · asked by cubicles4 1

2006-10-08 13:23:54 · 4 answers · asked by meatwad811 1

2006-10-08 13:00:06 · 5 answers · asked by T.T 2

what is a possible set of quantum numbers for the 2 highest energy electrons in a 82Pb atom? (n,l,ml,ms)

2006-10-08 12:52:22 · 1 answers · asked by BMac 3

determine the mass defect of this nuclide

2006-10-08 12:51:50 · 2 answers · asked by t-man foshizzle 2

I have this problem from homework that I'm having a hard time figuring out. I've looked in the book to try and solve it, but have had no luck.

Gasoline has a density of 0.86 g/ml. How much weight do you add to your care by filling the tank with 15 gallons of gasoline. Report in units of grams, kilograms, and pounds.

If anyone could assist me with solving the problem, I'd really appreciate it!

2006-10-08 12:48:27 · 8 answers · asked by justinz_1fan 2

2006-10-08 12:44:10 · 4 answers · asked by angys51 1

A) matter is lost and energy is taken in
B) matter is lost and energy is released
C) matter is gained and energy is taken in
D) matter is gained and energy is lost

2006-10-08 12:43:26 · 3 answers · asked by t-man foshizzle 2

In my O-Chem experiment, I had to extract and isolate caffeine from tea, and then purify it, and take the melting point. The mp of pure caffeine supposed to be 237C, while mine (and others, and according to the text it should be this way) was lower: 219C. WHY? it's one of the question for the post-lab. HELP!

2006-10-08 12:38:31 · 5 answers · asked by Thi 2

what is the electron configuration (short form) and number of unpaired electrons of 29Cu^+2? Explain please.

2006-10-08 12:38:13 · 1 answers · asked by BMac 3

what is the electron configuration (short form) and number of unpaired electrons of 34Se? and how did you get it?

2006-10-08 12:36:14 · 1 answers · asked by BMac 3

what's the symbol origin for silicon? why did they use si for the symbol why not something else?

2006-10-08 12:32:54 · 3 answers · asked by =) 2

Element. How much energy is used up during a period of 5 hrs. by the elemen
A. 352 Wh
B. 550 Wh
C.1,760Wh
D2,580

2006-10-08 12:32:46 · 4 answers · asked by Traci K 1

in my chemistry homework, I am given for the H atom: E_n_ = -(21.79*10^-19 J)/n^2
E_ph_=(21.79*10^-19 J)/((n_L_^-2)-(n_U_^-2))

if it is transitioning from n=1 to n=2, what do the other things mean. How would you calculate the wavelength.

Thanks, I can not find the code for my ebook, so i dont have a book.

2006-10-08 12:32:12 · 1 answers · asked by BMac 3

2 is a subscript, I know because Hydrogen has 2 atoms and Oxygen has 1 atom. How do you know how many atoms it has? and how do you get the number 2!!!!? Does the period (You know Hydorgen is period 1) has a role to play in it.

2006-10-08 12:22:09 · 7 answers · asked by =)) 3

im doing a lab report and we have to do equations. what im confused about is if there are 2 potassiums would the charge for the 2 of them together be 2- by adding up the charges of the 2, or would it still be 1-, because thats what that charge of potassium is?

2006-10-08 12:03:15 · 2 answers · asked by fashionistaqt 3

If you have a graph of LN concentration on the Y axis and Time on the X axis, graphing the data gives you a Y=Mx+B, how would you use this to find the rate constant.

2006-10-08 12:02:19 · 5 answers · asked by cassandracorrao 3

the smallest units of an element that can exist alone or in combination with atoms of the same or different elements is the

2006-10-08 11:17:08 · 6 answers · asked by jimmy N 1

2006-10-08 10:38:42 · 4 answers · asked by ♥Paula♥ 1

NH4Br, the 4 is supposed to be small and in the bottom right corner. I don't get it. How did they get those letters and numbers?

2006-10-08 10:07:32 · 8 answers · asked by =)) 3

2006-10-08 10:05:56 · 5 answers · asked by blue w 1

i'm referring to amino acids. at first i thought the residue was the R group coming off of the amino chain.

2006-10-08 09:32:55 · 5 answers · asked by cjoak 1