Chemistry - August 2006

PLZ I NEED HELP

2006-08-31 12:31:54 · 11 answers · asked by vballplayer 1

Calculate the density (in units of grams per cubic centimeter) of a crown that weighs 4.46 pounds and displaces 181 mL of water.

2006-08-31 12:20:50 · 7 answers · asked by mohammed r 1

2006-08-31 12:10:01 · 5 answers · asked by mohammed r 1

2006-08-31 11:50:06 · 4 answers · asked by Anonymous

2006-08-31 11:45:19 · 6 answers · asked by fosment 1

2006-08-31 11:34:53 · 4 answers · asked by Anonymous

i have a 12 oz bottle of 98.5% alcohol. what can i do with it?

2006-08-31 11:32:46 · 15 answers · asked by Anonymous

2006-08-31 11:25:03 · 7 answers · asked by cetemple@sbcglobal.net 1

i would like to know what the liquid is inside a glow stick and why it needs shaking to glow brighter

2006-08-31 11:24:16 · 9 answers · asked by Anonymous

Its a projec for school thank you

2006-08-31 10:46:13 · 10 answers · asked by D blood 1

2006-08-31 10:40:42 · 2 answers · asked by Anonymous

2006-08-31 10:38:25 · 2 answers · asked by Anonymous

2006-08-31 10:36:42 · 3 answers · asked by Anonymous

How much heat energy is given out when 300ml of 0.1 M NaOH solution is reacted with sufficient HCl solution.

NaOH(aq) + HCl(aq) -> NaCl(aq) + H2O(aq) ?H= -56.2kJ/mol NaOH

And assuming that the volume of the solution after reaction is 600 mL, with mass 600g and the initial temperature of the solution was 25°C, and also assuming that the heat capacity of the solution is the same as water's = 4.184 J/g/K. What is the final temperature of the solution after the reaction?

This is a nasty one. I'd like to see the work.

2006-08-31 10:10:44 · 2 answers · asked by RED MIST! 5

Could someone please show me an expression for Kp in the following

2NO2 -> N2O4

2006-08-31 10:08:31 · 4 answers · asked by RED MIST! 5

i just wanted to know

2006-08-31 09:19:04 · 11 answers · asked by ally 1

2006-08-31 08:33:25 · 1 answers · asked by ladypanther120292 1

which pairs of liquids are likely to be miscible?

a. H2SO4 and water
b. C8H12 and water
c. CS2 and CCl4
d. C8H18 and C6H6
e.C2H5OH and water

2006-08-31 08:23:21 · 6 answers · asked by Anonymous

which of the following are true solutions?

a.) Italian salad dressing
b.) rubbing alcohol
c.) algae in pond water
d.) black coffee

2006-08-31 08:20:43 · 11 answers · asked by Anonymous

2006-08-31 08:11:54 · 16 answers · asked by numbnuts 1

2006-08-31 08:02:28 · 4 answers · asked by Anonymous

2006-08-31 07:43:15 · 2 answers · asked by moonface 2

2006-08-31 07:30:35 · 3 answers · asked by LLynn 1

2006-08-31 07:22:22 · 2 answers · asked by fds d 1

2006-08-31 07:10:23 · 4 answers · asked by fds d 1

2006-08-31 06:37:25 · 6 answers · asked by malenursern39 1

2006-08-31 06:32:02 · 4 answers · asked by malenursern39 1

what job that relates to technology contributes in utilizing chemical reactions?

2006-08-31 05:28:09 · 3 answers · asked by chris18_keruso 1

1. A student studied the clock reaction described in this experiment. She set up this reaction mixture: 6I-(aq)+BrO3-(aq)+6H+(aq)=(it means reaction)3I2(aq+Br-(aq)+3H2O, by mixing 20 mL 0.010 M KI, 10 mL .001M Na2S2O3, 10 mL 0.040M KBrO3,and 10 mL 0.10 M HCl. It took about 45 seconds for the color to turn blue.
a.She found the concentration of each reaction in the reacting mixture by realizing that the number of moles of each reactant did not change when that reactant was mixed with the others, but that its concentration did. For any reactant A, no,moles A=Ma stock*Vstock=Mamixture*Vmixture
The volume of the mixture was 50 mL. Revising the above equation, she obtained Mamixture=Ma stock *(V stock mL)/50 mL. find the concentration of each reactant by using the above equation:
(I-) ? BrO3- ? H+ ?
b. what was the relative rate of the reaction?(1000/t)

2006-08-31 04:39:54 · 5 answers · asked by saharkhoshab 1

2006-08-31 03:10:03 · 3 answers · asked by Andrew A 1