Chemistry - September 2006

we did a stoichiometric experiment with CuSO4 (copper sulfate). so what would happen to the percent yeild if 1)the product was washed with water instead of acetone,2) not all the acetone was removed when we dried the product, 3) the beaker was not rinsed with the additional 5 mL of ethanol, 4) more then 10mL of water was used to dissolve the anhydrous copper sulfate

2006-09-28 16:23:25 · 3 answers · asked by hockeyislife21 1

2006-09-28 16:21:29 · 1 answers · asked by Alex R 1

2006-09-28 16:19:17 · 3 answers · asked by isisprincesa04 1

N = No e^-kt where N = number of atoms, No=initial number of atoms at time equals 0

2006-09-28 16:14:35 · 1 answers · asked by xXxSmartGuyxXx 3

2006-09-28 16:06:50 · 4 answers · asked by jamin7_cda 1

For example:
If I mix these following solutions, will a precipitate form and how will I know?
NiSO4(aq) + Pb(NO3)2(aq)
Na2CO3(aq) + NH4Cl(aq)

2006-09-28 16:01:46 · 5 answers · asked by CWEED 2

2006-09-28 15:45:39 · 3 answers · asked by Steven W 1

2006-09-28 15:43:45 · 1 answers · asked by hobomagic001 2

2006-09-28 15:03:59 · 6 answers · asked by gen 2

2006-09-28 14:55:35 · 2 answers · asked by Anonymous

I have Sodium Chloride as liquid and I want to use it as oxidizer in making black powder.

2006-09-28 14:40:59 · 3 answers · asked by Morris, KIP 2

How do you know how many dots to put?

2006-09-28 14:28:38 · 2 answers · asked by Anonymous

2006-09-28 14:06:54 · 3 answers · asked by Anonymous

A 10.00-mL sample of 0.254 M H2So4 reacts with 15.00-mL of 0.385 M NaOH according to the reaction H2SO4(aq) + 2NaOH --> 2H20 (l) + Na2SO4 (aq). Which of the following statements is correct? A) There is an excess of 3.24 x 10^ -3 mol of NaOH, B) There is an excess of 3.24 x 10 ^-3 mol of H2SO4, C) There is an excess of 2.19 x 10^-3 mol of H2SO4, D) Neither NaOH nor H2SO4 is present in excess or E) Ther is an excess of 6.95 x 10^-4 mol of NaOH

According to the answer key for my exam, the correct answer is choice E. I put choice A. Where did I mess up?

2006-09-28 14:03:23 · 1 answers · asked by Anonymous

In the last hundred years, Million years? Why or why not

2006-09-28 13:46:04 · 8 answers · asked by Pablo 4

2006-09-28 13:41:32 · 2 answers · asked by MMC 1

actually my only question is does lithium solid count as a ion for writing this new ionic equation or it is only with aqueous?

2006-09-28 13:16:41 · 1 answers · asked by applejacks 3

if you weighed the magnesium ribbon before burning and the magnesium oxide after burning, would the mass afterward be greater, less, or the same????? why???????

2006-09-28 13:13:13 · 8 answers · asked by Anonymous

2006-09-28 13:08:59 · 2 answers · asked by raedakhanafer 1

2006-09-28 13:07:45 · 7 answers · asked by streetsk8ter@swbell.net 1

list 5 indicators that a chemical reaction has tackin place,

2006-09-28 12:58:34 · 3 answers · asked by Anonymous

In the reaction between a hydrohalic acid and alcohol, the rate of reaction depends on the structure of the alcohol, with the third degree being more reactive than the second degree, which is more reactive than first degree alcohols, why will the alcohol strucutre affect the reaction rate in this way?

2006-09-28 12:50:27 · 2 answers · asked by Anonymous

What is MTBE ?
~ Where is it found/ used ?

~How it works

~ Effects on Humans

~ Formula (if there is one )

FYI: this is not my homework ~ i jst want to knw wat it and info about it
so plz dont waste ur or mi time saying i dont knw or do it urself

2006-09-28 12:48:53 · 2 answers · asked by Latina129 2

I forget.

2006-09-28 12:26:52 · 9 answers · asked by streetsk8ter@swbell.net 1

This is really important...im doing a science fair project in finding the sugar concentration in apple juice but i dont even kno where to begin because i dont even kno how to find sugar concentration, i dont kno what to use....i just dont kno if ayone can help me i will be so grateful!!!!

2006-09-28 12:13:31 · 1 answers · asked by Anonymous

What variable is the end result?

2006-09-28 12:13:21 · 3 answers · asked by streetsk8ter@swbell.net 1

2006-09-28 12:12:19 · 1 answers · asked by untilyoucamealong04 3

how does it relate within a period?
how does it relate within a group?

2006-09-28 12:11:55 · 2 answers · asked by Anonymous

where can i find one that isn't combined with oxygen?

2006-09-28 11:57:09 · 1 answers · asked by thundor456 1

2006-09-28 11:40:47 · 1 answers · asked by Anonymous