Chemistry - August 2007

2007-08-23 14:05:10 · 2 answers · asked by lolitta 4

Ok I tutor my neighbor for her science class and I'm stumped.

How would a birthday candle work differently instead of wax using steel?


How would a birthday candle work differently with wax but a non absorbant flamable wick?

2007-08-23 13:52:54 · 1 answers · asked by Delia 2

physical
chemical
both chemical and physical
neither chemical nor physical



Which of the following is a chemical property of matter?


freezing point

color

density

flammability

2007-08-23 13:30:37 · 3 answers · asked by Anonymous

The question is to draw a line-bond structure for propene, CH3CH=CH2, and indicate the hybridization of each carbon and predict the value of each bond angle. I figured out how to draw the lines and how it is arranged, but I don't know why there is a bend in the structure. Why does it bend? Does it have something to do with the hybridization? How do you predict this?

2007-08-23 13:20:54 · 2 answers · asked by Kiko 3

2007-08-23 13:15:35 · 8 answers · asked by Susie 6

Just part of a Chem. question.

If the molarity of acetic acid is 0.01735 moles/liter, what is the percent acidity of 10.23 mL vinegar?

P.s.- Acetic acid is 60 grams per mol.

2007-08-23 11:06:38 · 2 answers · asked by Anonymous

What is true about CFC's: a) very reactive chemicals. b) Generally unreactive, but deecompose when exposed to solar radiation. c) CFC's are contaminating ground water. d) directly react with ozone. e) More CFC's are in use now than ever before

2007-08-23 09:35:07 · 2 answers · asked by BlanketyBlank 4

ok well my sci teacher said that she made a liquid that is almost like liquid nitrogen it is not as cold she said to put dry ice in alcohol. I want to kow if that works and is there any other way to make it

2007-08-23 09:31:22 · 4 answers · asked by phil p 1

2007-08-23 09:27:02 · 4 answers · asked by Anonymous

Name the following compounds or write their formulas.

1) ______ carbon tetrachloride
2)______ iron (III) nitrate
3) ______ aluminum hydroxide
4)______ CuSO4
5) ______ C3H4
6)______ ammonium sulfite
7)______ C2H5OH
8)______ WBr5
9)______ stannous fluoride
10)_______ nitrogen (II) oxide
11)________ PI3
12)________ heptyne

Please help I need to study off of this!!!

2007-08-23 09:14:09 · 6 answers · asked by Anonymous

2007-08-23 08:55:44 · 2 answers · asked by MedTq367 6

Ok so Aspartame is C14H18N2O5

How many atoms of nitrogen are in 1.2g of aspartame?

If anybody could explain how to do this I would greatly appreciate it.

Thanks.

2007-08-23 08:43:06 · 4 answers · asked by Andrea 2

2007-08-23 08:28:04 · 3 answers · asked by shellyeph 1

What is atomic mass and how do u find the atomic mass of an element (example: hydrogen) ?

2007-08-23 08:18:33 · 5 answers · asked by mangojuicy19 3

2007-08-23 08:18:08 · 2 answers · asked by Anonymous

Explain what is meant by saying that the sharing of electrons between atoms falls on a continuum from nonpolar covalent bonds to ionic bonds

2007-08-23 08:04:28 · 5 answers · asked by julie 1

1.) strong bases have a greater ability to accept hydrogen ions from water than weak bases T? F?

2.) blood acts like a buffer in the body T? F?

3.) plants deficient in nitrogen have a twisted and defromed growth patterns. T? F?

4.) virtually all plants can fix nitrogen. T? F?

5.) Plants use clacium in the production of cell walls. T? F?



1.) What makes an acidic solution corrosive?


2.) Which is a strronger acid- sulfuric acid or carbonic acid?

2007-08-23 07:59:27 · 1 answers · asked by Anonymous

at the end of the reation

on the left of the arrow

on the right of the arrow

a and b

a and c

2007-08-23 07:54:49 · 3 answers · asked by CHRIS 1

slow down atoms in a compound

form chemical bonds in the products of a reation

break the chemical bonds and free atoms to form new bonds

force a chemical reation to a completion

stop a chemical reation

2007-08-23 07:53:26 · 3 answers · asked by CHRIS 1

Garden lime or Ca[OH]2,is produced form calcium oxide or CaO by the addition of water,H2O as in the following equation

CaO + H2O ----- Ca[OH]2


Combination

Decomposition

ionic

Conservation of matter

Displacement

2007-08-23 07:50:33 · 2 answers · asked by CHRIS 1

1)Calcium
2)Arsenic
3)Fluoride, F^-1
4)Mg^2+

2007-08-23 07:49:01 · 2 answers · asked by Bucky 1

1)NH3
2)NO2^-1
3)N2
4)NO2CL
5)N2H4

2007-08-23 07:47:26 · 4 answers · asked by Bucky 1

where it's electron goes

2007-08-23 07:42:52 · 8 answers · asked by Abhishek B 1

energy asorbed as bonds break

energy liberated as bonds break

none of the above

the sun

high-speed collisions between reactant atoms

2007-08-23 07:21:53 · 3 answers · asked by Anonymous

Na2CO3 + CaCI2 --- __NaCI + CaCO3

2

3

-1

1

0

2007-08-23 07:19:18 · 2 answers · asked by Anonymous

need some help please........

2007-08-23 06:57:30 · 3 answers · asked by Anonymous

This was on my chemistry review and i don't know what it means about the polyatomic ions, so if anyone has any clue to what the answer is could you help me out? and please try to explain how you figured that since i should probably know.

2007-08-23 06:52:42 · 2 answers · asked by Anonymous

2007-08-23 06:24:19 · 2 answers · asked by Mercedes 1

Equations -

2KClO3 ---> 2KCl +3O2
2KHCO3 --->K2O+H2O+2CO2
K2CO3 -----> K2O+ CO2

the KCl does not react under the conditions of the reaction.

If 100g of the mixture produces 1.80g of H2O, 13.20 g of CO2 and 4g of O2,

WAT WAS THE COMPOSITION OF THE ORIGINAL MIXTURE?(assume complete decomposition of the mixture)

P.S.----- please show me the full step..... homework help.... please...

2007-08-23 06:16:08 · 1 answers · asked by watever 1

2007-08-23 04:27:30 · 2 answers · asked by Anonymous