Chemistry - December 2006

Does anyone know the cost of 1g of Iron? I need to find the cost of 1g for a Chemistry project

2006-12-05 11:35:43 · 1 answers · asked by conkers 1

whats the difference between a sublevel and an orbital? and what about the electron holding abilites of each?

2006-12-05 11:22:49 · 1 answers · asked by tmlfan 4

the reaction is Fe2O3 + C -> Fe + CO

If 25.0 kg of pure Fe2O3 is used how many kilograms of iron can be produced?

2006-12-05 11:20:20 · 3 answers · asked by ? 2

formula for computing atomic mass

2006-12-05 11:16:50 · 3 answers · asked by nineonetwo112502 1

2006-12-05 11:03:42 · 1 answers · asked by Anonymous

2006-12-05 11:01:13 · 1 answers · asked by Anonymous

2006-12-05 10:59:01 · 2 answers · asked by musiccreatefree 1

2006-12-05 10:53:11 · 2 answers · asked by mkymous64 1

Write a molecular equation for the precipitation reaction (if any) that occurs when the following solutions are mixed. If no reaction occurs, enter NR in each answer box. (Type your answer using the format CO2 for CO2. Do not leave any box blank. Use the lowest possible coefficients.)


(a) potassium bromide and calcium sulfide
___KBr(aq) + ___ CaS(aq) = ___ (s) + ___(aq)

(b) barium nitrate and lithium sulfate
___Ba(NO3)2(aq) +___ Li2SO4(aq) = ___(s) + ___ (aq)

(c) chromium(III) nitrate and potassium phosphate
___Cr(NO3)3(aq) + ___ K3PO4(aq) = ___(s) + ___(aq)

(d) aluminum sulfate and sodium hydroxide
___Al2(SO4)3(aq) + ___NaOH(aq) =___(s) + ___(aq)

2006-12-05 10:52:16 · 1 answers · asked by Anonymous

can someone plss tell me the development of sodium hydroxide? Who found it out and wht r the raw materials?

2006-12-05 10:51:39 · 3 answers · asked by NH 2

A bottle of wine contains 12.5% ethanol by volume. the density of ethanol is 0.789 g/cm3. calculate the concentration of ethanol in wine in terms of mass percent and molality

2006-12-05 10:45:38 · 1 answers · asked by Anonymous

Calculate the molarity and mole fraction of acetone in a 1 m solution of acetone (CH3COCH3) in ethanol (C2H5OH). The density of acetone is 0.788g/cm3 and ethanol is 0.789 g/cm3. assume that the volumes of acetone and ethanol add.
ahh i dont kno how to approach this!!!!!!

2006-12-05 10:44:53 · 2 answers · asked by Anonymous

What the Quantitative Analysis is in a science project?

2006-12-05 10:42:45 · 3 answers · asked by Kylie 1

What weights of Bovine Serum Albumin (molecular weight 66,000) are required to give solutions of 10ml and 100ml volumes containing 1μmole of BSA

2006-12-05 10:36:15 · 2 answers · asked by Anonymous

a) For an acid H-O-A : the greater the electronegativity of A, the weaker the acid HA

b) For an acid H-A : the weaker the H-A bond, the stronger the acid H-A

c) HBr is a stronger acid than HF

d) H2SO3 is a weaker acid than H2SO4

e) HBrO is a stronger acid than HIO

f) For carboxylic acids : the smaller the electronegativities of the atoms in the group bonded to the carboxyl group, the stronger the acid

2006-12-05 10:35:45 · 1 answers · asked by Anonymous

I need help solvign this chem problem. I got one out of four and thte progrma said that these three wre wrong. thanks for the help



_____C7H8(s) + _____ (g) = _____ CO2(g) +_____ (l)

_____H2SO4(aq) + _____ (aq) = _____K2SO4(aq) + _____ (l)

_____HNO3(aq) + _____ (aq) = _____CsNO3(aq) + _____ (l)

2006-12-05 10:29:17 · 2 answers · asked by Anonymous

1. low electrical conductivity as solids, and high conductivity in solution when molten

2. relatively high melting and boiling point

3. brittleness

2006-12-05 10:28:53 · 1 answers · asked by pixela007 2

A reaction has a ΔH0 = + 15.6 kJ and a ΔS0 = + 256.5 J/K. Calculate the minimum temperature for which the reaction becomes product favored.

2006-12-05 10:17:22 · 1 answers · asked by Uli S 1

I tried this problem but the program said i had the wrong answer


Complete and balance each of the following equations for gas evolution reactions. (Type your answer using the format CO2 for CO2. Use the lowest possible coefficients.)


(a) ______HClO4(aq) + ______K2CO3 = ______ (g) + ______(l) + ______ (aq)

(b) ______HC2H3O2(aq) + ______ LiHSO3(aq) = ______(g) + (l) + ______(aq)

(c) ______(NH4)2SO4(aq) + ______Ca(OH)2(aq) = ______(s) + ______ (g) + ______ (l)

(d) ______HCl(aq) + ______ZnS(aq) = ______(g) + ______(aq)

2006-12-05 10:17:15 · 0 answers · asked by Krazyk78 1

I'm learning a new topic in one of my classes that involves joules and so on and I would really appreciate your help. Please help. Thanks!

2006-12-05 10:16:32 · 6 answers · asked by Sweety01 1

H3O+ + OH- → 2 H2O
The change in G0 is -631 kJ
(R = 8.31 J.K-1)

2006-12-05 09:51:19 · 5 answers · asked by Uli S 1

What weights of Bovine Serum Albumin (molecular weight 66,000) are required to give solutions of 10ml and 100ml volumes containing 1μmole of BSA?

2006-12-05 09:33:57 · 3 answers · asked by Anonymous

You have a 2.5mM solution of alanine (molecular weight 89.1). If you dilute this solution 1:10 to yield 10mls of the new solution how much alanine does it contain?

2006-12-05 09:32:22 · 2 answers · asked by Anonymous

Write a balanced chemical equation for the synthesis reaction of F2(g) with each of the following elements.

part a
___Al(s) + ____ F2(g) + ____# of _______ (s)

part b

_____Ag(s) + _____F2(g)= _____# of ________(s)

2006-12-05 09:23:47 · 2 answers · asked by Krazyk78 1

What is the concentration in moles/litre that results from diluting a 10%w/v solution of NaCl (molecular weight 58.1) four fold?

2006-12-05 09:13:58 · 1 answers · asked by Anonymous

2006-12-05 09:03:17 · 2 answers · asked by Anonymous

1. Element possesses +48 nuclear charge
2. Is an alkaline earth metal found in period 6
3. Lightweight metal with molar mass of 26.98 g/mol
4. Transition metal with atomic number of 39
5. First member of rare earth metals
6. Has ionization energy of 1577 kJ/mol
7. Is a period 4 nonmetal known since 1650
8. is a member of group 16 known since time of Roman empire
9. is a halogen whose crystals sublime
10. Has an atomic radius of 0.099 nm
11. Forms a diatomic gas witha a molar mass of 160 amu
12. Has a molar mass of 127.6 g/mol
13. Is a group 8 metal known during the time of the Roman Empire
14. Is element named after German word for Satan
15. has average atomic mass of 59 amu
16. Has nuclear charge of +44
17. has 114 neutrons within its nucleaus


Im sorry, I know this is asking a lot, but this is just 17 of nearly 100 that I have done. It is taking me so long, and I would be very gratefull for any help with these last few that I cannot find.

2006-12-05 08:51:42 · 5 answers · asked by Michael F 1

2006-12-05 08:46:00 · 7 answers · asked by laura y 1

2006-12-05 08:45:44 · 4 answers · asked by LadyT 1

water is made up of hydrogen and oxyogen, the body is made of 90 percent water, but why in the world do we need water? Oxyogen is a gas we breath, hydrogen is another gas, why cant we just live on that instead of having to deal with water?

2006-12-05 07:32:12 · 5 answers · asked by sweets_vch 1