Chemistry - July 2007

2007-07-09 05:40:54 · 9 answers · asked by Anonymous

Whats the value of M subscript h+ in the HCl solution? and
M subscript OH( negative charge) in the NaOH solution? and
M subscript NaOH from M subscripts OH with a negative charge.?

2007-07-09 05:26:35 · 2 answers · asked by C.T. 2

2007-07-09 05:26:19 · 8 answers · asked by Habt our quell 4

In a titration experiment, 45.7 mL of 0.500 M H2SO4 was required to neutralize a 20.0 mL sample of NaOH. Determine the concentration of the NaOH solution.

2007-07-09 04:48:38 · 4 answers · asked by fabulous101 2

Given the reactants, give the balanced chemical equations of the following and indicate if any, which products are soluble and which are not.

1)Sodium dihydrogen Phosphate + Sodium Hydroxide

2) Sodium Bicarbonate + Bromic Acid


(please help me. i'm not sure with my answers. thank you!)

10 pts for the best answer!

2007-07-09 04:22:17 · 2 answers · asked by carbonara 2

2007-07-09 04:10:01 · 4 answers · asked by vijay g 3

2007-07-09 02:07:03 · 6 answers · asked by pine 1

2007-07-09 01:08:59 · 6 answers · asked by Timothy 2

i said in the ionic equation all the 8h2o ions r only from mno4 but whne we see in the molecular equations it seem that 3 h2o molecules r from mno4 and 5 molecules r from 5h2so4 this u can solve if or take it
usman_qureshi22@yahoo.com

2007-07-08 22:47:47 · 1 answers · asked by Anonymous

first problem is this that in the molecular equation in the right hand side mn(2+) is joined with someother like mnso4 there fore u wrote it alone also what r spectators elements .Also in the molecular equation
kmno4+h2so4=>k2so4+mnso4+3h20 +5(o)
feso4+h2so4+5(o)=> fe2(so4)3+5h2o
main problem is this that in the ionic eqation (the top most) there r 8 h2o and seems that all r from mno4 which produces when 16H joined with o4 of mno4 so how in other molecular eqyations it is 3h2o then 5h2o although when u add it becomes 8h20. the problem is this that first equation shows that all h2o r from mno4 but the two molecular equations show that water is also from mno4 and also from h2so4 thanks

2007-07-08 22:03:49 · 6 answers · asked by Anonymous

For instance quartz-Si02 is considered to be essentially "purely" covalent but with a ionic behavour as well. . I do understand that bonds between the same non metal elements are pure covalent such as Cl-Cl and O-O. is the bond NaCl purely ionic? I am not sure.
Any help would be appreciated.

2007-07-08 18:43:58 · 3 answers · asked by Gideon 1

i want melt a granite stone without any sounds

2007-07-08 18:39:24 · 3 answers · asked by Anonymous

If you put HCl acid on a piece of galvanized iron, how can you determine the thickness of zinc?

2007-07-08 17:40:04 · 1 answers · asked by My OnLy HoPe 1

A 0.660g sample of a coumpound containing only Cerium and Chloride is dissolved in water and excess aqueous silver nitrate is added to precipitate 1.15g of silver Chloride. Calculate the empirical formula of the compound.

Molar Mass (g)
AgCl - 143.32
Ce - 140.12
Cl - 35.453

2007-07-08 16:48:12 · 2 answers · asked by Anonymous

2007-07-08 16:40:35 · 4 answers · asked by Anonymous

2007-07-08 16:33:19 · 5 answers · asked by curiosium 1

2007-07-08 16:18:57 · 2 answers · asked by crazy-girl 1

2007-07-08 13:52:04 · 16 answers · asked by Justin T 1

would the lava also become artificially radioactive???? would radioactivity be emmited from the lava.

2007-07-08 09:43:16 · 8 answers · asked by ksm 1

Select the most appropriate solvent for the following solutes:

solute-benzene
water
Hg
CCl4
gasoline


Solute-Br2
CCl4
gasoline
water
Hg


Solute-glucose
water
Hg
gasoline
CCl4


solute- Sn
gasoline
water
Hg
CCl4

2007-07-08 09:28:23 · 2 answers · asked by Anonymous

Select all the miscible pairs from the following liquids

1. H2O and CCl4

2. CCl4 and C6H12

3. H2O and C6H12

4. H2O and Br2

5. CCl4 and Br2

6. C6H12 and Br2

2007-07-08 09:22:56 · 1 answers · asked by Anonymous

I have to perform a complex problem but first I need to get an estimate of the % of organic molecules in a normal diet. It's not in our text so I've been looking online and so far cannot find.

2007-07-08 09:21:29 · 1 answers · asked by Denise T 2

What is the reason behind naming the energy shells(orbits in which electrons revolve) as K,L,M,N.........?????

2007-07-08 09:16:38 · 1 answers · asked by Anonymous

In 6.00 hours, the activity of a radioactive compound falls from 999 counts per hour to 634 counts per hour. What is the half-life of the isotope?

Please explain how to do this; I don't understand.

2007-07-08 08:20:23 · 6 answers · asked by Deborah P 2

And where would I find information like this Online?

2007-07-08 08:08:45 · 4 answers · asked by Marie Q 2

Identify the noble gas associated with each ion: Ca 2+; Li + and Mg 2+ (the numbers and charge are supposed to be small and in the upper right corner)

2007-07-08 07:47:39 · 3 answers · asked by mlssa_mllr 2

2007-07-08 07:35:22 · 2 answers · asked by Anonymous

pure liquid would do?

2007-07-08 06:48:21 · 2 answers · asked by Anonymous

The boiling point of CH4 is lower than the boiling point of SiH4, whereas the boiling point of NH3 is higher than the boiling point of PH3.

All i have to work with is the periodic table, so is it even possible to explain this in terms of universal chemical properties

2007-07-08 06:41:16 · 7 answers · asked by Sean F 2

A sample of gas at 38.0 degrees C occupies a volume of 2.97 L and exerts a pressure of 3.14 atm. The gas is heated to 118.0 degrees C and the volume is decreased to 1.04 L. Determine the new pressure exerted by the gas. (convert temperature to K before substituting in equation)

2007-07-08 06:35:59 · 4 answers · asked by Anonymous