Chemistry - March 2007

please help i need help with a few homework questions please be out there for example here is one of the questions:
illustrate how an electron transfer between atoms of magnesium and fluoire can produce ions. name the ions produced. give the formula and name of compound produced

2007-03-05 04:38:37 · 2 answers · asked by ny 1

The lattice energy of KCl(s) is −715 KJ/mol, and the enthalpy of hydration is −684 KJ/mol.

2007-03-05 04:35:48 · 2 answers · asked by simonkf2002 1

2007-03-05 04:34:33 · 3 answers · asked by themaestro 2

2007-03-05 04:33:42 · 6 answers · asked by Anonymous

2007-03-05 04:33:33 · 2 answers · asked by subramanian m 1

a) CuCl2

b) CH3CH2CH3

c) CS2

d) Cr

e) CH3CN

2007-03-05 04:32:13 · 5 answers · asked by simonkf2002 1

2007-03-05 04:31:42 · 2 answers · asked by Anonymous

2007-03-05 04:30:29 · 1 answers · asked by mahsa b 2

2007-03-05 04:29:24 · 2 answers · asked by Kevin 2

Chemistry

2007-03-05 04:29:22 · 5 answers · asked by Anonymous

It's Stochiometry.

2007-03-05 04:27:27 · 2 answers · asked by Stephanie W 1

2007-03-05 04:26:55 · 4 answers · asked by kunj 1

I have read conflicting opinions on this matter. I am trying to find out if very high purity DI water as used in the semiconductor industry can cause corrosion or metal leaching problems with stainless steel. If so are there any high grade s.s. available that can resist corrosion ? If not, would some kind of polymer coatings (teflon, pfa) help ? The DI water is contained in stainless steel container, heated and passed through stainless steel tubings.

2007-03-05 04:19:16 · 3 answers · asked by Hotcakes 3

In this equation, the minimum kelvin temperature the system must be heated to to make the below reaction product favored is 980.1136:

C (graphite) + CO2 (g) → CO (g)

1. What is the change in entropy (J/K-mol) for the universe of the above reaction at 25 oC ?

2. For the same reaction, what is the maximum useful work (kJ) that can be performed on the surroundings from the production of 3.9 moles of CO (g) ??

any help would be greatly appreciated!!!

2007-03-05 03:45:46 · 1 answers · asked by nietzsche 1

Why is it a better fuel source.
What is the effect of making Ethanol.
What are the benifits as this compared to other fuel source options

2007-03-05 03:44:03 · 3 answers · asked by Bob Lob Law 1

The lattice energy of CsI(s) is −604 KJ/mol, and the enthalpy of solution is 33 KJ/mol. Calculate the enthalpy of hydration (KJ) of 0.750 moles of CsI.


Enter a numeric answer only, do not include units in your answer

2007-03-05 03:15:22 · 4 answers · asked by Foxychick 1

Which of the following substances would you expect to dissolve in water?

a) NaCl

b) CH3OH

c) H3COCH3

d) C (graphite)

e) CH3CH3

2007-03-05 03:14:38 · 9 answers · asked by Foxychick 1

a) CFCl3 : nonpolar

b) NCl3 : polar

c) CaCl2 : polar

d) CH3CH2F : nonpolar

2007-03-05 03:13:06 · 4 answers · asked by Foxychick 1

The resulting solution was allowed to attain equilibrium at 24C. The absorbance of the equilibrium solution was recorded, and the [FeSCN2+] was determined graphically to be 7.53 x 10^-5 M.

a)calculate number of moles of Fe3+ initially added to the solution
b)calculate number of moles of FeSCN2+ formed in the solution at equilibrium
c)calculate final number of moles of Fe3+ present in the solution after equilibrium
d)calculate concentration of Fe3+ in the solution at equilibrium

2007-03-05 02:57:45 · 2 answers · asked by Anonymous

2007-03-05 02:57:45 · 2 answers · asked by smile 1

2007-03-05 02:51:33 · 2 answers · asked by emhill11 1

(assuming that there natures are such that they dont mix and that there is no chemical reaction between the two substances)?

2007-03-05 02:37:26 · 3 answers · asked by SAM 1

2007-03-05 02:28:21 · 10 answers · asked by Anonymous

a. oxygen B.hydrogenC.carbonD.dioxide..

2007-03-05 02:27:17 · 1 answers · asked by SAM 1

a. oxygen B.hydrogenC.carbonD.dioxide..

2007-03-05 02:24:03 · 2 answers · asked by SAM 1

2007-03-05 02:21:58 · 4 answers · asked by Anonymous

2007-03-05 02:04:25 · 12 answers · asked by arborgate 1

2007-03-05 02:01:41 · 4 answers · asked by arborgate 1

I was wondering the difference of Suave deodorant. Their active ingreedient is Aluminum Chlorohydrate 20%. Secret's (for example) is Aluminum Zirconium Trichlorohydrex Gly 19%. Are these the same ingredients or different ones? Also, how is the Suave brand comparable to major brans?

2007-03-05 01:51:51 · 2 answers · asked by Queen of Kings 4

a) HCl

b) CH3OH

c) CH3CH2OH

d) Hg

e) C6H6

2007-03-05 01:49:29 · 7 answers · asked by Gemini 2