Chemistry - February 2007

what is the formula for magnesium nitride

2007-02-02 12:29:08 · 3 answers · asked by Anonymous

the biosphere, lithosphere, hydrosphere or atmosphere. i need some ideas on a topic to do for my assignment. One examples is desalination.

2007-02-02 12:26:34 · 2 answers · asked by acer_junior 2

what is the chemical formula for ammonia

2007-02-02 12:21:48 · 12 answers · asked by Anonymous

Please also list the title and the source of this investigatory project,
it should be responsive to our nature.

2007-02-02 12:21:33 · 2 answers · asked by cutebaby_427 1

i have to answer the best in my debate in "should the philippine nuclear power plant exsist today?"the power plant was closed by the president of the philippines cory aquino after discovering the numerous negative effects of nuclear energy. i have to because our group suppports the positive effects but in our debate the negative group have more support in their topic

2007-02-02 11:49:23 · 3 answers · asked by karen:) 1

low octane and high octane what makes up the difference

2007-02-02 11:31:46 · 4 answers · asked by CRANE 1

2007-02-02 11:01:46 · 7 answers · asked by Report Abuse 2

Example would be HCl reacting with NaOH. It may have something to do with whether the acid is monoprotic or diprotic.

2007-02-02 11:01:18 · 1 answers · asked by Andrea 1

I heard that plastic releases dioxions when froozen and when the plastic reaches a certain temperture(microwave) it also releases these dioxions? I do not know if silicone is made from plastic?

2007-02-02 10:15:10 · 4 answers · asked by madonna b 1

2007-02-02 10:11:08 · 6 answers · asked by MADBOY 1

i find it on CRC but nothing

2007-02-02 10:08:07 · 5 answers · asked by Flongkoy 2

2007-02-02 09:59:55 · 5 answers · asked by Joan09 1

2007-02-02 09:44:08 · 2 answers · asked by suzy h 1

Hi, I need to know why stainless steel is rust proof please tell me its for my science project. :)

2007-02-02 09:38:18 · 15 answers · asked by mlmj1994 2

In a lisitng of chemicals, indentical names are sometimes followed by "indicator gr". What does that mean and as importantly what does that imply about the actual compound (quality, purity, etc...)? Thanks.

2007-02-02 09:35:46 · 2 answers · asked by Mike D 1

I have never heard of such a thing, but I was wondering if such a chemical compound exists. Chem teachers/profs never tell students about interesting things like this, but I was wondering about it. If so, please tell me if it occurs in nature or if it must be synthesized in a labratory. Thanks a lot.

2007-02-02 09:03:40 · 3 answers · asked by kmm4864990 1

Calculate the pH of a 0.10M solution oh hypochlorous acid, HOCl.

Ka = 3.5 x 10^-8

I understand the chemical equation will be:
HOCl + H20 === H30^+ + OCl^-

But as for the ICE table I don't understand which side would have the +x and which would have the -x.

2007-02-02 08:51:57 · 3 answers · asked by Anonymous

have missed my chemistry class for acouple weeks b/c i have been sick. my teacher just gave me a ton of work which i need help with. can you teach me about these topics please??
thankss

What is the purpose of the actvity series?
What is the mole(value, what it is used for)?

Discuss the Gas Laws- (Boyle, Charles, Ideal)

Discuss endothermic/exothermic reactions.
What are reactions at equilibruim?

pH scale --acid base and neutral(examples)

2007-02-02 08:33:10 · 3 answers · asked by nice too meet you. 4

2007-02-02 08:22:55 · 8 answers · asked by Anonymous

I understood it before, but I completely forgot it and I need to know it now. Any help is appreciated.

2007-02-02 08:16:08 · 2 answers · asked by yangster258 2

Stannous fluoride or tin fluoride,SnF2, is an ingredient that is able to decrease tooth decay.

a. would you calculate the atomic mass, molecular mass, or formula mass of stannous floride? Explain how you came to this decision??

b. What is the value for SnF2??

c. Avogadro's number is equal to 6.0221 x 10^23. How many fluoride ions are in 15.00 g of stannous fluoride??

2007-02-02 07:58:34 · 1 answers · asked by Tracey Lee ♥ 2

ok, i have a huge chem test soon and i need help.
its kind of like a midterm and its on ALOT of topics. i am really bad with chem, so I need help. also, my teacher doesnt teach and i need help with these topics...can someone help me please?

have missed my chemistry class for acouple weeks b/c i have been sick. my teacher just gave me a ton of work which i need help with. can you teach me about these topics please??
thankss

What is the purpose of the actvity series?
What is the mole(value, what it is used for)?

Discuss the Gas Laws- (Boyle, Charles, Ideal)

Discuss endothermic/exothermic reactions.
What are reactions at equilibruim?

pH scale --acid base and neutral(examples)

2007-02-02 07:56:50 · 3 answers · asked by nice too meet you. 4

Please tell me why we can't split carbon dioxide using either a filter or some process so that we're left with carbon and oxygen? Then we could place this filter or mechanism into a chimney or other carbon dioxide producing outlet; collect the carbon and release the oxygen. Please tell me why we can't do this? We can do it easily with other gasses, such as to power hydrogen cars, so why can't we do it with carbon dioxide to reduce our carbon emissions into the atmosphere? Thanks.

2007-02-02 07:43:41 · 8 answers · asked by Artist V 2

2007-02-02 07:40:09 · 1 answers · asked by Russie 1

I did about 6-8 balloons within three hours.

2007-02-02 07:38:13 · 26 answers · asked by KR7 5

i'm assuming its to do with temperature if so what persentage is heat and how much of the energy is converted to light

2007-02-02 07:30:50 · 9 answers · asked by only me 1

Use this reaction for the following questions:
2Al(s)+ 6H2O(g) --> 2Al(OH)3+ 3H2

a. determine the oxidation numbers of each element in both the reactants and the products of this oxidation reduction reaction of aluminum and water vapor.

b. which element is oxidized in this reaction?

c. which element is reduced in this reaction?

2007-02-02 06:52:24 · 1 answers · asked by Tracey Lee ♥ 2

i dont understand:
draw dot diagrams for one Li and one Cl atom.
write the symbols for these ions that show their overall charge.
write the formula for the compound formed.

if you know the answer, please explain it so, i can do the other problems as well

2007-02-02 06:47:00 · 6 answers · asked by globalpinaygirl 2

how do you balance the following:
___HNO3 + ___CaCO3 ----> ___CO2 + ___H2O +___ CaNO3

2007-02-02 06:45:57 · 3 answers · asked by alison m 1

2007-02-02 06:06:41 · 4 answers · asked by frickenawesomekoreanandyouknowit 2