Chemistry - September 2007

2007-09-30 14:24:03 · 5 answers · asked by Jessica R 1

A truckload of plastic soda bottles was finely shredded at a recycling center. The plastic shreds were placed into 55-liter drums. What is the mass of the plastic shreds inside one of the drums? Hint: 55-liters=55,000 milliliters=55,000cm^3

2007-09-30 14:23:05 · 2 answers · asked by Fruitsickle 2

A sample of air contains only nitrogen and oxygen gases whose partial pressures are 0.80 atm and 0.20 atm, respectively. Calculate the total pressure and the mole fractions of the gases.

2007-09-30 14:13:10 · 1 answers · asked by PiNk-PrInCeSs 3

what is the effect of shape on the density of the same material?

2007-09-30 14:07:45 · 2 answers · asked by police_usa_911 1

2007-09-30 14:00:53 · 1 answers · asked by Candy K 1

2-propoxy hexane

can't be hexyl propyl ether, because that doesn't indicate that the oxygen is on carbon 2, on the hexane chain..
how do I name it??

2007-09-30 13:57:08 · 1 answers · asked by Anonymous

If you could break up a carbon dioxide molecule, would you still have carbon dioxide? Can you please explain further on why / why not?

Thank you so much, the best explained answer, gets the 10 points.

& In what ways is sand in a bowl like a liquid?
in what way is it different?

:)

2007-09-30 13:48:06 · 4 answers · asked by lol! It's moi 2

It's like the C=C always have substituents. So , why it it on some examples the cis or trans or E or Z not used on the name of an alkene? My text doesn't explain

2007-09-30 13:47:10 · 2 answers · asked by Anonymous

please help

2007-09-30 13:42:38 · 2 answers · asked by ctaylor5142 1

more active metal in each reaction:
2Li + Cu2+ to form 2Li+ +Cu
Cr + 3 V3+ to form 3 V2+ + Cr3+
Cd + 2 Ti3+ to form 2 Ti 2+ +Cd2+

2007-09-30 13:38:30 · 1 answers · asked by Anonymous

I need to come up with a few ideas for science fair, but I'm drawing a blank. I'm interested in nutrition, and so far I have: Which citrus fruit (out of lime, lemon, orange, tangerine and grapefruit) provides the greatest quantity of vitamin c? This is high school science fair for honors students, and last year I competed at the state level, so no "baking soda volcanos". This science fair is pretty extreme (in other words, up until 2 am from now until january), so I need generally advanced topics. Any suggestions?

2007-09-30 13:38:29 · 2 answers · asked by Tomboy with girly tendencies 4

have been reduced:
Cl2+I2 to form I2 + Cl-
WO2+H2 to form W + H2O
Ca + H2O to form H2 + Ca(OH)2
4Al + 3O2 to form 2Al2O3

2007-09-30 13:33:03 · 1 answers · asked by Anonymous

K*2CO*3

2007-09-30 13:27:05 · 2 answers · asked by (: Muffin Man :) 2

Mg+O2 form to
Zn+HCl form to
Zn+Cu2+ form to

2007-09-30 13:26:50 · 4 answers · asked by Anonymous

What would any one or direct me to the diagram formation for K, potassium,, So4, plus if you can please Na sodium, Po3?

2007-09-30 13:23:08 · 2 answers · asked by Steven V 2

Ugh I really need help on that one, anyone?

2007-09-30 13:19:39 · 2 answers · asked by Anonymous

2007-09-30 12:52:56 · 1 answers · asked by Anonymous

2007-09-30 12:07:47 · 1 answers · asked by Anonymous

Help!!!!!! I have to come up with a chemistry project topic but I can't think of anything not too dangerous or not off-topic! I need an A+ idea ASAP. My hypothesis, outline, etc. are due by tomorrow but I need your ideas now! Please help in anyway you can! It's STRICTLY chemistry! And I have to be finish my outline in 3 hours from now! Thanks!

2007-09-30 11:41:31 · 2 answers · asked by AmyRose 3

I need to be able to find the difference between an Ionic compound, a molecular (or covalent) compound, and an acid given only the chemical formula (no charges or roman numerals)?

2007-09-30 11:35:06 · 7 answers · asked by Anonymous

2007-09-30 11:29:39 · 1 answers · asked by desidude420 1

The active agent in many hair bleaches is hydrogen peroxide. The amount of hydrogen peroxide in 17.0 g of hair bleach was determined by titration with a standard potassium permanganate solution.
2 MnO4-(aq) + 5 H2O2(aq) + 6 H+(aq) 5 O2(g) + 2 Mn2+(aq) + 8 H2O(l)

(a) How many moles of MnO4- were required for the titration if 43.4 mL of 0.109 M KMnO4 was needed to reach the end point?
mol
(b) How many moles of H2O2 were in the sample?
mol

2007-09-30 11:28:11 · 2 answers · asked by cj 2

-microwaves.

-ultraviolet rays.

-a blackbody spectrum.

-gamma rays.

-infrared rays.

2007-09-30 11:17:39 · 2 answers · asked by 1337Haxor 2

1. Write an equation for the dissociation of the following ionic compound when it dissolved in water Al2(SO4)3.
A. Al2(SO4) 3 (s) --> Al2+(aq) + SO43-(aq)
B. Al2(SO4) 3 (s) --> 2Al (aq) + 3SO43-(aq)
C. Al2(SO4) 3 (s) --> Al3+(aq) + SO42-(aq)
D. Al2(SO4)3(s) --> 2Al3+(aq) + 3SO42(aq)

23. How many grams of strontium nitrate Sr( NO3)2 would you need to prepare 2.00 L of a 0.400M solution of strontium nitrate?
A. 125 g
B. 169 g
C. 210 g
D. 299 g

24. What mass of methanol, CH3OH, must be dissolved to make 1.50 L of a 0.675M solution?
A. 4.5 g
B. 13.8 g
C. 22.1 g
D. 32.4 g

25. What is the molarity of a solution that contains 17.2 g of lithium perchlorate, LiClO4, in 2250 mL of solution?
A. .00760M
B. .0719M
C. .815M
D. 1.2M

2007-09-30 11:15:56 · 4 answers · asked by Anonymous

Which of the following statements are true for the 5f sublevel ?

a) n = 4

b) n + l = 8

c) l = 4

d) There are eight possible orbitals

e) There can be a maximum of eighteen electrons

f) There can be a maximum of eight unpaired electrons

2007-09-30 11:08:47 · 1 answers · asked by Anonymous

a) How many electrons in an atom can have the designation 6d ?

b) Which orbital has the following quantum numbers?

n = 3 minimum value of ml = -1

2007-09-30 11:08:10 · 1 answers · asked by Anonymous

group number- family name

2007-09-30 11:04:32 · 1 answers · asked by Anonymous

2007-09-30 10:34:12 · 1 answers · asked by jballer91 2

2007-09-30 10:30:23 · 3 answers · asked by annika 3

2007-09-30 10:26:06 · 1 answers · asked by Anonymous