Chemistry - November 2006

is boron reactive or very reactive or non reactive give two answers please

2006-11-06 04:12:31 · 3 answers · asked by Anonymous

2006-11-06 04:01:28 · 5 answers · asked by Alien Anjali 2

2006-11-06 03:51:42 · 3 answers · asked by Anonymous

2006-11-06 03:40:46 · 2 answers · asked by bebop_0632 1

2006-11-06 03:33:06 · 2 answers · asked by adam v 1

2006-11-06 03:29:43 · 2 answers · asked by adam v 1

2006-11-06 03:28:00 · 3 answers · asked by sue 2

The half-life of cesium-137 is 30 years. Answer the following questions assuming you start with 100 mg sample of cesium-137

A. How much Cesium-137 will be left after 2 half-lives?

B. How much Cesium- 137 will be left after 60 years?

C. How long will it take for the 100 mg of Cesium-137 to decay to 25 mg (1/4 the original amount)?


Please just any help on any question will be higly apretiatied

2006-11-06 03:22:21 · 4 answers · asked by cetinnovations 1

2006-11-06 03:15:28 · 2 answers · asked by ali 2

Please anyone know this chemistry "?". Thanks!

2006-11-06 02:54:17 · 1 answers · asked by Anonymous

order of the reaction can be negative... an example for the same is the formation of oxygen from ozone. the order with respect to oxygen is negative... but i need to know an experiment which proves the same. in case you are wondering the order with respect to oxygen is -1.

2006-11-06 02:50:47 · 3 answers · asked by sue 2

2006-11-06 02:38:14 · 3 answers · asked by beatrice s 1

2006-11-06 02:32:09 · 2 answers · asked by beautiful s 1

2006-11-06 02:19:03 · 6 answers · asked by Nowshad.M. U 1

does group 2 metals form basic oxide and base or only base.

2006-11-06 02:01:15 · 2 answers · asked by bjm 1

2006-11-06 01:59:33 · 1 answers · asked by limck_dcp_cls 2

2006-11-06 01:56:06 · 8 answers · asked by Anonymous

2006-11-06 01:42:28 · 3 answers · asked by crazyoverscott 2

A balloon filled with helium gas at 20 degrees C occupies 2.91 L at 1.00 atm. The balloon is immersed in liquid nitrogen at -196 degrees C that applies an external pressure of 5.20 atm to it. What is the volume of the balloon in the liquid nitrogen?




(Please Show Work!)

2006-11-06 00:31:23 · 3 answers · asked by Alyssia S 1

can i have an easy formula please for calculating how much solvent i need if i have a known weight of solid for 10mM

2006-11-06 00:27:34 · 12 answers · asked by jo 3

C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)

If propane reacts with oxygen as above

a. what is the limiting reagent in a mixture containing 5.00 g of C3H8 and 10.0 g of O2?

b. what mass of CO2 is formed when 1.00 g of C3H8 reacts completely?

2006-11-06 00:03:30 · 6 answers · asked by ally 2

2006-11-05 23:58:42 · 7 answers · asked by jess_goco 1

actually it has 2 parts:
1)balanced chemical formula for rxn with KHP and NaOH?
2)if the KHP was contaminated wiith NaCl, how would it affect the calculated normality of the NaOH?

2006-11-05 23:10:35 · 1 answers · asked by Anonymous

2006-11-05 22:57:38 · 8 answers · asked by dharmsurat 1

What is the chemical structure of Sulfide and how can in exist as S^2- ? Any help is much appreciated.

2006-11-05 21:47:33 · 5 answers · asked by Gideon 1

2006-11-05 19:51:12 · 9 answers · asked by mcben_23 1

iron(II) oxide + HCl ------> ????
the hint is that it is a orange/ yellow solution..
HELP!! many thanks ((:

2006-11-05 18:48:08 · 3 answers · asked by pigley 4

2006-11-05 17:25:26 · 3 answers · asked by rahman 1

2006-11-05 17:22:53 · 3 answers · asked by Roy J 1

2006-11-05 17:10:03 · 1 answers · asked by pearl.oyster 1