Chemistry - April 2007

2007-04-12 05:07:55 · 1 answers · asked by l_walker2005 1

I have a short paper due that i need to write and i would like some information that you guys can maybe find that would help me. I need pics and info. just give me the web address. Thanx.

2007-04-12 04:08:57 · 2 answers · asked by fish6776 2

there is an arguement if you should give your child Fluoride supplement and I thought its a poison.
Also, some say you shouldnt drink water w/ Fluoride, because its a poison.

2007-04-12 03:24:16 · 10 answers · asked by vynyc 1

I'm a little confused about something I read in an article in Motor Trend (May 2007). I also heard a reference to this in a news story on the radio as well.

This is with reference to using Gasoline as an automotive fuel and greenhouse gas emissions:
"Hydrocarbons and NOx emissions can be further reduced, but each gallon produces 19.4 pounds of CO2, so improved efficiency is the only CO2 abatement option, and diesel and hybrid technologies are more efficient."

What I don't understand is, if a gallon of gas weighs ~8 pounds, how does burning 1 gallon of gas result in 19.4 pounds of Carbon Dioxide? What are the other inputs (and outputs) of the combustion of gasoline that can result in 19.4 pounds of CO2 resulting from burning only 8 pounds of gasoline?

Please don't get overly technical in your explanation, I don't have a science or engineering background.

Thanks!

2007-04-12 02:22:42 · 4 answers · asked by 2007_Shelby_GT500 7

substance?

2007-04-12 02:20:10 · 4 answers · asked by darkraven_222000 1

In the periodic table, you have Group 2. Group 2 is made up of the elements: beryllium, magnesium, calcium, strontium, barium, and radium.

1st question: What is the number of electrons for a neutral atom of each element in this group?

2nd question: What is the number of outer electrons for a neutral atom of each element in this group?

2007-04-12 02:02:35 · 7 answers · asked by taylor17brown 1

What is the meaning of arene ? Arene means what any closed chain hydrocarbon or only aromatic hydrocarbon .

2007-04-11 21:48:59 · 4 answers · asked by Rajchem 2

1s^22s^12p^1? Construct one orbital diagram based upon the configuration, and use this to explain your answer.

Is this a trick question? How do I find this information?

2007-04-11 21:21:51 · 3 answers · asked by TwEeTy_576 1

2007-04-11 20:41:40 · 1 answers · asked by TwEeTy_576 1

2007-04-11 20:24:00 · 1 answers · asked by cute scientist 1

this is a mier compition, i am not working for alkida or that crap, lol

2007-04-11 20:07:14 · 7 answers · asked by Me + Me = BANG! 2

the 2 is suppose to be subscript

any help is much appreciated!

2007-04-11 19:19:01 · 1 answers · asked by Anonymous

a)Lime has the chemical formula CaO. It reacts with water to form a basic solution. Complete the following double displacment reaction. Balance the equation if necessary.

CaO (s) + H2O (l) -->

b) The resulting base then reacts with acid from the spill in a neutralization reaction. Write the balacned chemical reaction for this neutralization.

2007-04-11 19:04:04 · 1 answers · asked by TheDarkness 1

2007-04-11 18:14:28 · 1 answers · asked by Anonymous

2007-04-11 18:14:11 · 6 answers · asked by spongebob12121212 1

hey i drink like 1 soda a day sometimes 2, i heard that this will make ur bones weaker and more prone to osteoperosis due to the phosporic acid found in the sodas, any chem people can tell me if this is true? thanks

2007-04-11 18:04:03 · 2 answers · asked by Anonymous

Ar:
Pb - 207
S - 32

2007-04-11 17:58:07 · 1 answers · asked by Anonymous

2007-04-11 17:49:13 · 2 answers · asked by ? 4

2007-04-11 17:33:44 · 3 answers · asked by iza 2

2007-04-11 17:32:38 · 9 answers · asked by doublecap123 1

Which of the following are true for the Crystal Field Model of an octahedral complex ion? Consider ions to be from first-row transition metals.



a) The ligands cause all 3d orbitals to have equal energy

b) e orbitals are less stable than t2 orbitals

c) A large crystal field splitting energy results in a paramagnetic complex

d) The low--spin case gives minimum unpaired electrons

e) For a given ligand, Mn3+ causes a greater increase in the crystal field splitting energy than does Mn2+
think about the amount of coulombic attraction between the metal ion and the electrons on the ligands
and the closer the ligands, the more interaction there is with the d orbitals on the metal ion

f) Cl- causes a greater increase in the crystal field splitting enery than does H2O

g) The splitting of energy (E) of 3d orbitals occurs in the metal ion

2007-04-11 17:32:04 · 2 answers · asked by woj87marta 1

A solution at 25 degrees C contains 1.0M Cd2+, 1.0M Ag+, 1.0M Au3+, and 1.0M Ni2+ in the cathode compartment of an electrolytic cell. Predict the order in which the metals will plate out as the voltage is gradually increased.

2007-04-11 17:31:42 · 3 answers · asked by ChEMIsTrY ChICkiE 1

a) How many unpaired electrons are in the d-orbital splitting diagram for the octahedral complex ion of

Fe3+ high spin




b) How many unpaired electrons are in the following complex ion

Fe(CN)63-

2007-04-11 17:30:45 · 3 answers · asked by woj87marta 1

Which of the following have geometric isomers ?



a) [Co(H2O)4Cl2] +


b) [Co(H2O)3Cl3]


c) [Co(en)2(NH3)Br] 2+


d) [Pt(NH3)Cl3] −

2007-04-11 17:29:04 · 2 answers · asked by woj87marta 1

It took 2.30 minutes using a current of 2.00A to plate out all the silver from 0.250L of a solution containing Ag+. What was the original concentration of Ag+ in the solution?

2007-04-11 17:29:02 · 2 answers · asked by ChEMIsTrY ChICkiE 1

What is the heat of fusion in kJ/mol of a substance if 48.3 g of the substance absorbs 8.714 kJ when it melts, and the molar mass of the substance is 27.1 g/mol?

2007-04-11 17:25:09 · 1 answers · asked by Lil 1

How much heat would be required to increase the temperature of 1.000 kg of aluminum by 4.000 degrees Celsius? The specific heat of aluminum is 0.908 J/kg*K and the temperature is 4.000 degrees Celsius.

2007-04-11 17:23:09 · 3 answers · asked by Shane 1

I need to calculate the heat of reaction in kJ/mol for the reaction
SO2 + H2 + O2 produce H2SO4 given the following information
S + O2 = SO2 delta H = -297.1 kJ/mol
H2 +S +2O2 =H2SO4 delta H= -811.7 kJ/mol

2007-04-11 17:19:44 · 2 answers · asked by KE 1

2007-04-11 17:14:44 · 7 answers · asked by summer_langford_1220 1

How much energy will 5455 g of a substance release when it condenses? Assume that the heat of vaporization of the substance is 16.0 kJ/mol and that its molar mass is 36.1 g/mol.

2007-04-11 17:12:48 · 2 answers · asked by glance 3