Chemistry - February 2007

Also, what macroscopic evidence indicates that aqueous metal ions are being reduced?

2007-02-25 12:37:28 · 4 answers · asked by Julie 3

2007-02-25 12:29:53 · 1 answers · asked by mcrlover862 1

2007-02-25 12:24:55 · 3 answers · asked by Lauren G 1

And also:Indium oxide contains 4.784 g of indium for every 1.000 g of oxygen. In 1869, when Mendeleev first presented his version of the periodic table, he proposed the formula In2O3 for indium oxide. Before that time it was thought that the formula was InO. What values for the atomic mass of indium are obtained using these two formulas? Assume that oxygen has an atomic mass of 16.00.

The formulas:
In2O3

InO

2007-02-25 12:08:25 · 4 answers · asked by Leo L 2

I have these for a class home work assginment and I don't know how to figure this out...

What is the molecular mass of CaCO3? Include appropriate units?



If you had 50 grams of CaCO3, how many moles of CaCO3 would you have? (Show your work and include appropriate units.)



I just need help understanding it, thank you

2007-02-25 11:59:32 · 2 answers · asked by Ashlee 3

2007-02-25 11:58:42 · 4 answers · asked by HomeworkHelpNeeded 2

i need to know how u get the certain suffix's to the different ions and ionic compounds, like the cations, the anions or whatever they r called. basically where do u put the ite, ate, ous, and ic endings

2007-02-25 11:57:38 · 3 answers · asked by Anonymous

I know it's part of animal decomposition, and responsible for the horrid smell, but what about:
--the chemical name?
--the molecular formula?
--it's structural formula (ie. a ball and stick diagram of the molecule's structure)?
Any help is greatly appreciated!

2007-02-25 11:49:44 · 1 answers · asked by MeganH 2

Find the percentage composition of a compound that contains 1.51 g of chromium, 1.13 g of potassium, and 1.62 g of oxygen in a 4.26-g sample of the compound. Please explain how you did it too (: thanks!!

2007-02-25 11:48:54 · 4 answers · asked by that girl♥ 1

I know that Crystallography is involved in these processes, but how does it help?

2007-02-25 11:44:24 · 2 answers · asked by tsunami_xza 1

2007-02-25 11:42:46 · 3 answers · asked by idkkkk 2

I moved to a state that requires chemistry to graduate, and I moved in the second semester. So I have to try to catch up with everybody else, while they have the first 7 chapters under their belts.
Thanks for the help!

2007-02-25 11:41:24 · 1 answers · asked by julyanletona 2

2007-02-25 11:39:20 · 6 answers · asked by Anonymous

Would the ph of this solution change if the volume was doubled/

2007-02-25 11:38:11 · 1 answers · asked by anshika g 1

A sample of an unknown compound with a mass of 2.876 g has the following composition: 66.07 percent carbon, 6.71 percent hydrogen, 4.06 percent nitrogen and 23.16 percent oxygen. What is the mass of each element in this compound?



Its for 9th grade pre chemistry. thanks!! (:

2007-02-25 11:33:00 · 2 answers · asked by that girl♥ 1

2007-02-25 11:29:32 · 0 answers · asked by Anonymous

How do you determine if a molecule is polar or non polar? I know that you can determine the polarity of the individual bonds associated within the entire molecule, but how can I say this whole molecule is polar/non polar?

2007-02-25 11:26:25 · 3 answers · asked by Anonymous

Fe2(SO4)3 + NaOH = Fe(OH)3 + Na2SO4

Get the points if it's right

2007-02-25 11:22:17 · 3 answers · asked by Keenan 2

ok so i was assigned 12 problems for homework but i can't remember how to do them..can u do one problem for me and explain the steps? THANKS SOOO MUCH!! This is 9th grade pre chemistry


ok the question is...

A sample of an unknown compound with a mass of 0.847 g has the following composition: 50.01 percent fluorine and 49.49 percent iron. When this compound is decomposed into its elements, what mass of each element would be recovered?

2007-02-25 11:19:41 · 1 answers · asked by that girl♥ 1

2007-02-25 11:16:55 · 6 answers · asked by Gideon 1

Why do ionic substances have a greater effect on freezing and boiling temperatures of solvents than do non-ionic substances for a given number of moles?

2007-02-25 11:09:31 · 1 answers · asked by smrtkaur 1

alright if u use the formula c = greek letter for wave length * v
c stands for 3.00 x 10^8 m/s and you use the number 7.04 for wavelength how would u find the frequency

2007-02-25 11:04:09 · 4 answers · asked by nickcasey829 1

2007-02-25 11:01:57 · 13 answers · asked by idkkkk 2

2007-02-25 11:01:47 · 2 answers · asked by Tony 1

What is the electron configuration of each of the following ions? Use the noble gas abbreviation of the configuration. Enter the sublevels in the order in which they are filled. For example, type your answer using the format [Ar]4s2 3d10 4p2 for [Ar]4s23d104p2. Do not enter empty sublevels. If the ion is ioselectronic to a noble gas, enter just the symbol for the noble gas, for example [Ne]

Cl1-

Sb3+

2007-02-25 11:01:08 · 2 answers · asked by Danny W 1

calcium carbonate reacts with CH3COOH (acetic acid) to form Ca+(CH3COO-) (calcium diacetate), water and carbon dioxide.

2007-02-25 10:58:44 · 2 answers · asked by Ashlee 3

2007-02-25 10:53:56 · 4 answers · asked by Tony 1

Based on its position on the periodic table, I know that Bromine has a higher electronegativity value than Iodine, but why? Thanks for your help!

2007-02-25 10:51:37 · 3 answers · asked by silver 2

what always happens when two objects at different temperatures come in contact?

2007-02-25 10:50:16 · 5 answers · asked by salvamag145 2

2007-02-25 10:49:51 · 2 answers · asked by Koko Butta Kream 4