Chemistry - October 2007

A copper atom has a diameter of 127.8 pm (10^ -12 m=1 pm). What is the length in meters of a line containing 1.000 mols of copper atoms? Thanks!

2007-10-03 19:06:07 · 3 answers · asked by Anita 5

2007-10-03 19:01:44 · 1 answers · asked by xxbabycheekzix 1

2007-10-03 18:59:30 · 2 answers · asked by jennifer f 1

2007-10-03 18:58:52 · 1 answers · asked by jennifer f 1

2007-10-03 18:58:01 · 1 answers · asked by jennifer f 1

chlorine solution + potassium iodide solution -> ???
and what is the symbol equation???

2007-10-03 18:54:04 · 2 answers · asked by *gemma* 2

Is there a highly productive and effecient way to chemically react something wth CO2 to make it managable and possible solid?

2007-10-03 18:14:54 · 2 answers · asked by Anonymous

YES, I do know of the dangers of murcury, so please no lectures. :P

Thanks!

2007-10-03 17:50:10 · 9 answers · asked by Anonymous

Bi2O3(s) + 3 C(s) 2 Bi(s) + 3 CO(g)

(a) When 320. g Bi2O3 reacts with excess carbon, how many moles of Bi2O3 react?
mol
(b) How many moles of Bi form?
mol

2007-10-03 17:45:26 · 1 answers · asked by dubs 1

I'm new to chemistry. so I really need your help.
I have never learned chemistry in america, sometimes it's really hard to understand the question's meaning.

here is the chemistry problem.

Q) Ethanol (the drinking alcohol), C2H5OH, has a density of 0.789 g/cm^3. You have a 5.0 gallon drum of alcohol. How many pounds does the alcohol weigh?

I don't know how to solve the problem....

could you please help me?

thanks in advance!

2007-10-03 17:22:50 · 1 answers · asked by Anonymous

An oxygen molecule travels 975 miles per hour at room temperature. What is the velocity in meters per second?
10 pts to best first answer!

2007-10-03 15:57:44 · 5 answers · asked by Help312 2

Water is added to 4.267 grams of UF6. The only products are 3.730 grams of a solid containing only uranium, oxygen and flourine and 0.970 grams of a gas. The gas is 95.0% flourine, and the remainder is hydrogen.

A. From this data determine the empirical formula of the gas
B. What fraction of the fluorine of the original compound is in the solid, and what fraction in the gas after the reaction.
C. Whta is the formula of the solid product.
D. Write a balance equation for the reaction between UF6 and H20. Assume the empirical formula of the gas is the true formula.

2007-10-03 15:56:47 · 2 answers · asked by Mizan S 1

1. a type of chemical reaction in which one reactant is oxygen and one product is water, is called what?

2. an ion that's composed of only a single atom, is called what?

3. what is the only known polyatomic ion with a plus 1 charge?


if you could help me with any or all of these thanks you very much!

2007-10-03 15:50:09 · 1 answers · asked by Colin M 1

Nitrogen dioxide has opposing roles in our world. It is essential in the industrial production of nitric acid, but is also a contributor to acid rain and photochemical smog. Calculate the volume of nitrogen dioxide produced at 717.3 torr and 22.4°C by the reaction of 8.65 cm3 copper (d = 8.96 g/cm3) with 219.6 mL nitric acid (d = 1.42 g/cm3, 68.0% HNO3 by mass):

Cu(s) + 4HNO3(aq) → Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)

2007-10-03 15:46:30 · 1 answers · asked by Will P 1

Liquid helium at 4.2 K has a density of 0.147 g/mL. Suppose that a 1.50-L metal bottle that contains air at 110K and 2.0 atm pressure is sealed off. If we inject 80.0 mL of liquid helium and allow the entire system to warm to room temperature (25 °C), what is the pressure inside the bottle?

2007-10-03 15:44:06 · 1 answers · asked by Will P 1

Electrolysis of MOLTEN barium iodide. What forms at the anode?

2007-10-03 15:42:35 · 1 answers · asked by Anonymous

Contribute to water weight???

2007-10-03 15:42:28 · 4 answers · asked by Poptart_fingers~!~ 2

2007-10-03 15:34:15 · 3 answers · asked by Anonymous

Can someone please explain to me how i can find the answer ..thankss

2007-10-03 15:32:41 · 5 answers · asked by Anonymous

air,fuel,ignition source,oxygen,or nitrogen

2007-10-03 15:30:09 · 2 answers · asked by slick 1

A sample of benzene, c6h6 contains 3.0 * 10 to the power of 23 molecules of benzene. how many grams are in the sample?

2007-10-03 15:29:23 · 5 answers · asked by Anonymous

how can I tell something is basic or acidic just by looking at its formula

2007-10-03 15:23:22 · 1 answers · asked by raleighzia 1

Organic Chemistry

2007-10-03 15:06:30 · 2 answers · asked by Win 1

a mixture of 53.5 mL of 0.10 M KClO3

K+ ____M
ClO3- ____M

2007-10-03 15:04:19 · 1 answers · asked by Andrea W 1

The pH of white vinegar solution is 2.45. This vinegar is an aqueous solution of acetic acid with a density of 1.09 g/mL. What is the mass percentage of acetic acid in the solution?

Can someone explain the process of determining the answer - I don't know where to start. How do I solve it? Hint: The answer is 4.1%.

2007-10-03 14:06:26 · 2 answers · asked by genchem06 1

2007-10-03 13:55:09 · 2 answers · asked by Anonymous

2007-10-03 13:42:29 · 1 answers · asked by mike p 2

How many grams of Mg metal can be produced in 3.00 h using a current of 47.0 amps to electrolyze molten magnesium chloride?

2007-10-03 13:13:37 · 1 answers · asked by Anonymous

what tempeture will the mixture turn when you mix baking soda and vinegar together, what actions will take place?

2007-10-03 13:01:20 · 2 answers · asked by LaLa K 1

I just want to know the exact number of neutrons in a normal Neon atom, not an isotope or ion.

2007-10-03 12:10:18 · 5 answers · asked by Glen L 1