Chemistry - November 2006

the gold in question has quartz and ironstone attached, also need to know dilution ratio.

2006-11-06 08:48:42 · 4 answers · asked by goldssearch 1

what is the # of protons, neutrons, and electrons (seperatley) and what is the atomic mass?
thanx yall

2006-11-06 08:45:57 · 3 answers · asked by basketball chica 2

okay im asked to arrange compounds that were tested in order by increasing extinction coefficients. There is only 2, 2.263 for CuSO4 and 3.326 for CoCl2.

Now it says to discuss what this order means in terms of ability of these substances to absorb light. Here is what I got from wiki:

The extinction coefficient for a particular substance is a measure of how well it absorbs electromagnetic radiation (EM waves). If the EM wave can pass through very easily, the material has a low extinction coefficient. Conversely, if the radiation hardly penetrates the material, but rather quickly becomes "extinct" within it, the extinction coefficient is high.

So I guess that would mean that the higher the extiction coeffcient the better the ability to absorb light?

2006-11-06 08:41:22 · 0 answers · asked by axcryingxshame 1

plotting a acid/base tiration

2006-11-06 08:35:42 · 2 answers · asked by Anonymous

For example, the processs, the amount of heat needed, maybe even a chemical equation if you have one handy. Also ot be more specific as to what kind of paper I'm talking about, just assume that the paper is average loose-leaf paper that you write on.

2006-11-06 07:51:01 · 3 answers · asked by Anonymous

2006-11-06 07:39:06 · 6 answers · asked by allison t 1

2006-11-06 07:38:49 · 8 answers · asked by asshang 1

you can even just enter how much a sample you saw go for and how big it was, i can convert it to $/gram

and no i am not buying any so no warnings or quotes of the law please

2006-11-06 07:29:29 · 2 answers · asked by Anonymous

I know that magnesium has two valance electrons and becomes Mg(2+) when it loses it's electrons in an ionic bond, but can it become Mg(1+) by losing just one of it's electrons? Or is that impossible?

2006-11-06 07:28:18 · 5 answers · asked by Anonymous

2006-11-06 07:10:35 · 16 answers · asked by Anonymous

2006-11-06 07:03:43 · 4 answers · asked by whe_86 1

what is it?

2006-11-06 06:52:20 · 4 answers · asked by Anonymous

i wanna any help on the miscible liquds and if any one know any application on that i need an application that is based on the misciblity of liqud and if it have any relation with petrolum that will be great ( sorry for asking too much )

2006-11-06 06:51:59 · 2 answers · asked by tiger kid 2

i want to neautralise BaOH and I think you do with a carbonate. Is this write and can someone help with the equation

Ba(OH)2 + CO3 --->

2006-11-06 06:48:03 · 10 answers · asked by Anonymous

my sister asked me that this morning.....i was wondering is it possible or would the microwave blow up?

2006-11-06 06:14:05 · 27 answers · asked by wondergal1759 1

to the erupting of my volcano?
I am in an elementary education chemistry class and we are making volcanos that can be used in our classrooms someday but for the assignment part I have to turn in a reason as to why these chemicals give off the reaction they do when mixed.

To make my volcano I mixed baking soda, yeast, water and dish soap together and got no reaction, but when i added the peroxide, the reaction rose and gave the erupting effect. I tried leaving out one ingredient each time but the reaction wouldn't work when i did, so i know each ingredient has a purpose. Please help me with this problem! i have been searching for over an hour and still have no idea.

thanks!

2006-11-06 06:02:36 · 4 answers · asked by Aly 1

Use the following information to calculate the mass lost when 2 moles of hydrogen atoms fuse with 2 neutrons to form 1 mole of helium.

The molar mass of hydrogen 1 over1 H= 1.00782522 g

The molar mass of a neutron 1over0 n= 1.00807134 g

The molar mass of helium 4over2 He= 4.00260361 g

The balanced nuclear reaction is 2 1over1 H+ 2 1over0 n --> 4over2 He + energy




Question B.

According to Einstein's question, conversion of one gram of mass yields 9*10^10kJ of energy. How much energy is released in the above reaction?

I know this is a lot of work but any help I meen any help will be greatly cherished and apretiated

2006-11-06 06:00:49 · 4 answers · asked by cetinnovations 1

I'm sooo stuck. I'd really appreciate a step by step if anyone would be so kind. Thanks in advance.

1. What is the maximum mass of lead that can be obtained by the reaction of 57.33 gramsof PbO and 33.80 grams of PbS?

2. What volume of 1.131M BaCl2 is required to react completely with 42.0 ML of .453 M NA2SO4 ?

3. If 3.00 mol of FeCl3 are ignited in the presence of 2.00 mol of O2 gas how much of which reagent is present in excess and therefore remains unreacted?

If anyone can help me i'd really appreciate it. I don't know what I am doing and this is worth 50 points which i reaaallyyy need!

2006-11-06 05:59:42 · 2 answers · asked by Anonymous

Why is the reaction of alkenes with HCl (a rapid, simple reaction) NOT useful as a characterization reaction, but reaction with Br2 is a good characterization reaction?

2006-11-06 05:56:50 · 6 answers · asked by kelxcore09 1

if the number of moles of gas is doubled at constant temperature and volume, the pressure of the gas.

a. halved
b. is doubled
c. is quadrupled
d. remains the same

2006-11-06 05:46:51 · 4 answers · asked by Shawn 1

2006-11-06 05:36:03 · 3 answers · asked by Amit Mangal 1

2006-11-06 05:35:40 · 3 answers · asked by kelxcore09 1

2006-11-06 05:33:58 · 3 answers · asked by instigatorstartsit 1

2006-11-06 05:25:56 · 7 answers · asked by homedawg252 1

chemisty

2006-11-06 05:23:35 · 4 answers · asked by Anonymous

Suppose that 1.2 g of NaOH is dissolved in 500mL of a aquous buffer that is 0.400 M in NaC2H3O2 and 0.800 M in HC2H3O2.

Calculate the resulting pH and the change in pH.

Please show work so I can figure it out...I've been having a hard time with this!

Thanks!

2006-11-06 05:18:44 · 2 answers · asked by Anonymous

If you could show how you got some of the work I would so greatly apretiate it. Thank you so much for all you do for me, Clint

2006-11-06 05:11:30 · 4 answers · asked by cetinnovations 1

2006-11-06 04:34:55 · 3 answers · asked by rida a 1

or very reactive or non reactive remember boron is a metalloid
and lithium is a metal

2006-11-06 04:26:38 · 4 answers · asked by rida a 1

what is the substance to cause the explosive decomposition of C3H5N9O3?

2006-11-06 04:13:53 · 5 answers · asked by Slam 2