Chemistry - July 2007

the stronger acid
the stronger base
both (a) and (b)
neither (a) nor (b)

2007-07-24 04:40:30 · 1 answers · asked by notachemwiz 1

an Erlenmeyer flask
a graduated cylinder
a volumetric pipet
none of the above

2007-07-24 04:39:13 · 3 answers · asked by notachemwiz 1

NaOH?

H3O+(aq) + Cl-(aq) + Na+(aq) + OH- aq) ®
Na+(aq) + Cl-(aq) + 2H2O(l)
HCl(aq) + NaOH(aq) ® NaCl(aq) + H2O(l)
H3O+(aq) + OH-(aq) ® H2O(l)
none of these

2007-07-24 04:37:18 · 3 answers · asked by notachemwiz 1

2) Why wouldn't we use poly(ethene) to make these things?

a) saucepans
b) shoes
c) car windscreen

3) Write down the names of the polymer made from propene.

4) Poly(propene) is also strong and hard wearing. Explain why these two properties are important in a rope.

5) What happens to plastics in landfill sites? Explain your answer

6) Describe two other problems caused by plastics in the environment.

7) Scientists are developing some biodegradable plastics. Why do you think they are doing this?

8) Write down one problem of recycling plastics.

2007-07-24 03:59:30 · 1 answers · asked by Anonymous

largest atomic radius in period 5?
largest atomic radius in group 3A
highest ionization energy in group 18
lowest ionization energy in period 2
configuration [Ar] 5s2 4d10 5p2

2007-07-24 03:36:13 · 3 answers · asked by holly B 3

I totally forgot!!!

2007-07-24 02:48:05 · 5 answers · asked by Kraziegurl79 ist ein Rock Star 7

2007-07-24 00:41:00 · 4 answers · asked by twinkle 2

Is it possible to melt glass at a high enough temperature that it turns back into sand?

2007-07-23 21:41:30 · 3 answers · asked by Chad 2

2007-07-23 21:23:55 · 2 answers · asked by Anonymous

......and do you know what are the names of the 3 general properties of ACIDS?

2007-07-23 21:18:35 · 3 answers · asked by Anonymous

2007-07-23 21:16:51 · 2 answers · asked by Anonymous

with each of the ff. substances Cl2, HCl, h2, HBr

2007-07-23 21:14:15 · 2 answers · asked by sha c 1

2007-07-23 21:13:52 · 1 answers · asked by Anonymous

2007-07-23 21:12:01 · 2 answers · asked by Anonymous

2007-07-23 21:08:51 · 2 answers · asked by Anonymous

2007-07-23 20:40:13 · 2 answers · asked by sha c 1

if you have 2 grams of Aluminum and 3 grams of CuCi^2 then how much Cu should you produce. how do u find out the answer

thanks for the help

2007-07-23 17:16:38 · 1 answers · asked by simdawgydawg 2

2007-07-23 16:35:08 · 3 answers · asked by L L 1

Ok I know equivalence point is when amount of base or acid added is equal to amount of acid or base present. Does "amount" just mean volume of acid or base added = volume of acid or base present, or is it in moles??

2007-07-23 15:53:53 · 5 answers · asked by victoria 5

i.e. when I asked Einstein's famous question about what someone would see while riding on the front of a beam of light, it said something about "seeing beyond the surface/appearance" (my interpretation of hexagram 22) and "a unity, greatness, balance in working together" (for hexagram 11, in context of the question). I don't know how to interpret further, and besides, the answer just feels like a clue...

2007-07-23 15:19:17 · 3 answers · asked by Anonymous

2007-07-23 12:58:46 · 2 answers · asked by linifer74 1

2007-07-23 12:32:45 · 3 answers · asked by vlking76114 1

And do you believe each one can actually be used in aiding healings?
I'd like to hear some examples.

2007-07-23 12:14:11 · 1 answers · asked by deirdrefaith 4

when dissolved in water they give acidic solutions
when dissolved in water they give basic solutions
when dissolved in water they give neutral solutions
the acidity or basicity of the solution depends on the identity of the salt

2007-07-23 11:15:01 · 2 answers · asked by Anonymous

have you ever seen one of those diet coke and mentos videos where instead of just letting it shot up like this http://youtube.com/watch?v=5xH67ed78S0 they close the top and shake it up then throw it on the ground how do you do that caz when i tryed it it all shot up before i could close the top what the trick to doing it and also i saw a couple videos where when they did it it didn't shoot up at all how do i avoid that?

2007-07-23 11:12:11 · 5 answers · asked by Must riot 2

HNO3
H2SO4
both (a) and (b)
neither (a) nor (b)

2007-07-23 11:10:45 · 3 answers · asked by Anonymous

the concentration of all the reactants
the stoichiometric ratio of the reactants
both (a) and (b)
neither (a) nor (b)

2007-07-23 10:58:53 · 3 answers · asked by notachemwiz 1

2007-07-23 09:27:32 · 9 answers · asked by Anonymous

2007-07-23 09:14:49 · 2 answers · asked by Anonymous

Life is transparent.............................

2007-07-23 07:37:40 · 3 answers · asked by Unbreakable Me 5