Chemistry - November 2006

2006-11-12 04:40:28 · 3 answers · asked by brucelee135 1

A chemist mixes 300 grams of water at 75 degrees Celsius with 100 grams of water at 15 degrees Celsius. To find the final temperature of the water after mixing, use the equation m1(t1-t)=m2(t-t2), where m1 is the quantity of water at the hotter temperature, t1 is the temperature of the hotter water, m2 is the quantity of water at the cooler temperature, t2 is the cooler temperature of the cooler water, and t is the final temperature of water after mixing.

2006-11-12 04:38:59 · 4 answers · asked by Advisor 1

2006-11-12 04:37:52 · 2 answers · asked by brucelee135 1

Hi,

My Mate told me this a few days back and was wondering if it were true.

Could someone tell me why,

the best answer gets 10 points, it should say why, and maybe give an example of another substance that does funny things like that.

2006-11-12 04:28:36 · 4 answers · asked by Wedge 4

grams of water are needed?
thank you everybody.....

2006-11-12 04:19:16 · 3 answers · asked by zen2to 1

2006-11-12 04:03:32 · 1 answers · asked by henry f 2

In the production of carbon disulfide, coke and sulfur dioxide are reacted. If 8.00 grams of sulfur dioxide reacts, how many moles of carbon dioxide are produced?

Answer to this question would be helpful BUT I would rather know how to set up the equation instead.

2006-11-12 03:57:39 · 2 answers · asked by beachbum 1

What is the use of ultrasound rays or microwave in chemical reactions? I need some reactions examples too, please.

2006-11-12 03:40:57 · 2 answers · asked by zary n 1

A 10 to the -9 (-9 is supposed to be a superscript) M NaOH aqueous solution is:

A. Acidic
B. Basic
C. Neutral
D. Saturated

Why did you choose that answer?

2006-11-12 03:17:53 · 2 answers · asked by beachbum 1

What types of reactions are these?
2Mg + O2 = 2MgO
Zn + 2HCl(aq) = ZnCl2 + H2
2H2O2(aq) = 2H2 + 2O2
Fe + CuSO4 (aq) =FeSO4 + Cu
Pb(NO3)2 (aq) +H2SO4 (aq) = PbSO4 + 2HNO3
CaCO3 (s) + 2HCl (aq) = H2O+CaCl2+CO2
CuSO4.5H2O (s) = CuSO4 + 5H2O
Na2O(s) + H2O = 2NaOH
FeSO4 (aq) + KMnO4 (aq) =
Na2CO3 (aq) + 2HCl (aq) = 2NaCl + H2O + CO2
Thanks

2006-11-12 02:58:28 · 4 answers · asked by etomi a 1

2006-11-12 02:54:55 · 8 answers · asked by Lindsay A 1

a) C + H2
b) CH2 + H2O
c) CO2 + H2
d) CO2 + H2O

2006-11-12 02:45:11 · 4 answers · asked by JESSE H 1

help!!!

2006-11-12 02:42:21 · 2 answers · asked by Anonymous

a) no hydroxide ions
b) a relatively small fraction of the max number of hydroxide ions
c) a relatively large fraction of the max number of hydroxide ions
d) 100% of the max number of hydroxide ions

2006-11-12 02:41:53 · 2 answers · asked by JESSE H 1

What is the name of the polymer formed? Thanks!

2006-11-12 02:23:05 · 2 answers · asked by Anonymous

Thanks!

2006-11-12 02:21:25 · 2 answers · asked by Anonymous

omg

2006-11-12 02:18:50 · 3 answers · asked by Anonymous

Na has ionic radius of 0.157 nm. Mg has radius of 0.136nm. Why is the Mg atom smaller?

2006-11-12 02:09:50 · 1 answers · asked by rock_angel3005 2

2006-11-12 01:19:02 · 11 answers · asked by mariehunt137@btinternet.com 1

Im not sure. Im confused with the 6 electron thing.

thanks

2006-11-12 00:48:58 · 3 answers · asked by Anonymous

2006-11-12 00:47:15 · 5 answers · asked by catalyst 1

2006-11-12 00:43:17 · 1 answers · asked by Anonymous

candles made of parrafin for instance.

2006-11-12 00:30:07 · 3 answers · asked by Bobbie 1

Yes, I know it was a week ago, but we went last night, and they had fireworks that went up in the sky, then down, then up again. How do they do that?

2006-11-12 00:19:35 · 3 answers · asked by emily_jane2379 5

2006-11-12 00:16:00 · 1 answers · asked by Faisaltheonly1 2

I was just thinking of this, anyone any ideas?

2006-11-11 23:37:11 · 8 answers · asked by sparkle 5

2006-11-11 22:53:19 · 5 answers · asked by crazi_gal 1

2006-11-11 20:39:53 · 8 answers · asked by francine d 1

2006-11-11 19:25:14 · 10 answers · asked by <3 2

2006-11-11 19:14:06 · 6 answers · asked by Vivek N 1