Chemistry - December 2007

A gas bottle contains 0.650 mol of gas at a pressure of 730torr. more gas was added to the bottle and the final pressure was 1.15atm. how many moles of gas were added to the bottle?
a. 0.0680mol
b. 0.128mol
c. 0.717mol
d. 0.788mol
e. more information is needed.

2007-12-16 08:48:32 · 2 answers · asked by Neha G 1

1.) 2
2.) 10
3.) 5
4.) 6
5.) 18

2007-12-16 08:46:15 · 9 answers · asked by ANGERST T 1

2007-12-16 08:43:54 · 2 answers · asked by Anonymous

I am doing acids and alkalies in Science and I can't find an answer to this question.

2007-12-16 08:42:25 · 4 answers · asked by DeeDee 2

what would be the reaction between copper Cu and sodium hydroxide in aqueous anoxic solution (No oxygen, no air, no any oxidant) ?

2007-12-16 08:39:38 · 3 answers · asked by Manuelon 4

2007-12-16 08:19:07 · 5 answers · asked by Anonymous

2007-12-16 08:06:06 · 4 answers · asked by Char 3

i wanted to know if i balanced this correctly:

Magnesium reacts with titanium(IV) chloride (TiCl4) to produce magnesium chloride (MgCl2) and titanium.
4Mg + TiCl4 ---> 2MgCl2 + 4Ti

I am not sure how to do this one:

Carbon reacts with zinc oxide to produce zinc and carbon dioxide.


Thanks!

2007-12-16 07:52:02 · 3 answers · asked by fsh 3

any good points in changing fuel for methanol

thanks

2007-12-16 07:43:17 · 4 answers · asked by LoVE LiFE 3

2007-12-16 07:34:47 · 2 answers · asked by Anonymous

2007-12-16 07:33:49 · 5 answers · asked by Anonymous

2007-12-16 07:33:09 · 4 answers · asked by Anonymous

2007-12-16 07:28:50 · 4 answers · asked by Anonymous

How many grams of air are required to complete the combustion of 93 grams of phosphorus to produce diphosphorus pentoxide, assuming air to be 23% oxygen by mass?

Notes: All gasses under STP conditions, 1 cm^3=1 mL, 1 dm^3=1 L

2007-12-16 07:23:43 · 2 answers · asked by Anonymous

2007-12-16 07:23:27 · 3 answers · asked by ladylobo33 1

I know that it always has one specific charge, but I'm not sure what it is. Is it always zinc IV or zinc III?

2007-12-16 07:20:18 · 6 answers · asked by Anonymous

a. Mg and F

b. Ga and P

real answer only please if ou get it right 10 points to you!!!

2007-12-16 07:20:05 · 1 answers · asked by l∑†s p@®†¥ msg me :)=] 4

2007-12-16 07:10:32 · 3 answers · asked by maggie_soccer_960 1

2007-12-16 06:50:15 · 1 answers · asked by sweet2468579 1

2007-12-16 06:44:20 · 1 answers · asked by Anonymous

So I think I have discovered a new equation:
Beer + Cigarette butt = homemade volcano
Why???

After drinking 2/3 of a miller highlife last night I threw my lit cigarette butt into the bottle. About thirty seconds later the bottle was overflowing. I was pretty intrigued so I tried it again and the same thing happened.

I've been thinking about it all day and can't come up with a good scientific explanation.... Can you?

2007-12-16 06:44:17 · 3 answers · asked by kennyk 4

2007-12-16 06:43:11 · 3 answers · asked by Anonymous

for my chemistry lab of esterfication

2007-12-16 06:42:44 · 2 answers · asked by SeanL 2

2007-12-16 06:41:20 · 3 answers · asked by Anonymous

Which has the highest electronegativity?

1) K
2) Sb
3) Rb
4) As

2007-12-16 06:41:16 · 3 answers · asked by Anonymous

Acceptable units for electronegativity are

1) angstroms
2) no units for this quantity
3) kJ/mol

2007-12-16 06:38:53 · 1 answers · asked by Anonymous

Which one of the following has the lowest electronegativity?

1) chlorine
2) fluorine
3) oxygen
4) sodium

2007-12-16 06:38:09 · 3 answers · asked by Anonymous

what will it do to the catalysts in the engine etc?

2007-12-16 06:37:10 · 2 answers · asked by LoVE LiFE 3

balance this equation, i mean i know ho to do balance equations but, notthis kind of equation

2007-12-16 06:31:54 · 2 answers · asked by marco g 1

Methanol's high heat of vaporization results in lower peak flame temperatures than gasoline and lower nitrogen oxide emissions.

2007-12-16 06:11:56 · 7 answers · asked by LoVE LiFE 3