Chemistry - July 2007

i need investigatory project , and i want that there material are easy to find ,easy to do and interesting to observe or expirement>> please help me about this > i need example next 2 days i hope somebody help me........

2007-07-20 12:26:40 · 1 answers · asked by mic_bad1 1

can you please show me step by step on how to get this answer?

2007-07-20 08:59:47 · 2 answers · asked by holly B 3

what type of reaction takes place when u add soda to alcohol?

2007-07-20 08:02:37 · 16 answers · asked by raseem k 1

I'm trying to convert the following problems:
a. How many grams are in 5,280 mg?
b. How many meters are in 475 nanometers?
c. What is the mass in grams of a 72.6 kg man?
d. How many milliliters are contained in a 2L bottle?

The answers I got are:
a. 5.28 g
b. 4.75 X 10 to the negative seventh power m (meters)
c. 7.26 X 10 to the negative second power g (grams) OR .0726g
d. 2000mL

Did I do these right? Thanks for your help!

2007-07-20 07:20:45 · 7 answers · asked by Steven M 3

if I wanted to engineer chemicals, (example: polymers and industrial chemicals and such, other things somewhat relevant to biology), would a biochem and chem double major help alot or would it be overkill?

2007-07-20 06:59:33 · 4 answers · asked by Anonymous

2007-07-20 06:20:09 · 34 answers · asked by supergeordie2002 1

2007-07-20 06:16:25 · 12 answers · asked by Anonymous

Obviously it isn't an element because we use elements to "create" it. But what is fire technically? Is it classified as pure energy or the combustion of molecules? Could it be the temperature at which oxygen burns or possibly a "result" of certain chemicals when mixed?

2007-07-20 06:05:31 · 12 answers · asked by Anonymous

What does an electrolyte do in a battery? What determines the current of a battery?

2007-07-20 05:39:31 · 2 answers · asked by Anonymous

can u plz suggest me a simple but a unique project for chemistry class 12 cbse

2007-07-20 05:39:02 · 3 answers · asked by Anonymous

what is the difference between them?

2007-07-20 05:28:53 · 3 answers · asked by jenna 1

Is it because of liquid diffusion?

2007-07-20 03:24:02 · 3 answers · asked by Anonymous!!!! 2

I have an old sculpture made of sheet copper. It has some areas where the patina is missing.

2007-07-20 02:47:33 · 1 answers · asked by flagg108 1

Like how would i work out the reaction between magnesium and nitrogen or PCL3 and H2O, or calcium and chlorine, or SO2 and H2O????

2007-07-20 01:37:29 · 7 answers · asked by Anonymous

Especially Rechargeable battries in cell-phones

2007-07-20 01:08:43 · 3 answers · asked by Stranger 1

Q=mcdT

2007-07-20 00:41:59 · 2 answers · asked by Anonymous

Hi, I came across this quesiton in my textbook when I was studying for my chem test, and I couldn't come up with an answer for it.
Atomic orbitals... s, p, d, f orbitals..
and molecular orbitals... orbitals in the molecular orbital theory to explain covalent bonds?
=(
i'm confused. Thanks!

2007-07-20 00:35:59 · 6 answers · asked by yayaya 3

can we express water hardness in any other term like MgCO3 etc

2007-07-20 00:12:46 · 2 answers · asked by saeed 1

2007-07-19 23:30:00 · 6 answers · asked by Anonymous

Also how do you tell which ones are and which aren't?

2007-07-19 22:12:10 · 2 answers · asked by Anonymous

I need to know 3 different solutes that are in Coca-Cola and a solvent. Thanks.

2007-07-19 19:50:04 · 3 answers · asked by Arabella S 2

2007-07-19 16:09:33 · 6 answers · asked by Tito 1

I have this problem that i cannot figure out. Rubidium has a stable isotope with 48 neutrons and a mass number of 85. Rubidium also has an unstable isotope with 49 neutrons and a mass number of 86. The stable isotope has a relative abundance of 72.17% and an atomic mass of 84.9117 amu. What is the atomic mass of the unstable isotope?

could someone show me how to work this out...i tried two different ways to solve it, but i got two completely different answers, so i really don't know what to do now! Thanks!!!

2007-07-19 15:57:45 · 1 answers · asked by Anonymous

I'm probably making this harder than it actually is, but I'm not sure.

(6.98cm - 2.83cm) X 1.7 sq. cm

Do I just multiply 4.15 cm by 1.7 sq. cm or do I need to convert 4.15 to sq. cm first?

(Oberserving significant digits, would it be 7.1 sq. cm?)

Thanks for your help!

2007-07-19 15:55:48 · 4 answers · asked by Steven M 3

on the periodic table

2007-07-19 15:34:10 · 2 answers · asked by Tianna 1

2007-07-19 14:48:40 · 2 answers · asked by Anonymous

2007-07-19 14:14:03 · 2 answers · asked by Kym 1

What type of internships can you get? I heard from like makeup companies, and oil companies or somthing like that.

2007-07-19 12:15:24 · 8 answers · asked by Anonymous

P4 + 6F2 ---> 4PF3

What are the # grams of F2 are needed to produce 109 g of PF3 if the reaction has a 78.1% yield ?

Can anybody answer in sig figs: - I got 90.7 grams

2007-07-19 10:37:42 · 3 answers · asked by yoyo d 1

2007-07-19 09:01:32 · 5 answers · asked by Sarah smith 2