Chemistry - October 2007

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2007-10-09 05:23:45 · 1 answers · asked by Anonymous

I need to replicrate to density of bone, and i need to make a compound that I am able to make into the shape of the bone before the compound hardens.

2007-10-09 05:21:25 · 1 answers · asked by Anonymous

2007-10-09 04:57:04 · 2 answers · asked by ccutestuff2001 2

Cinnamic acid and urea melt at 133 C. The melting point of an unknown is found to be 133C. When the unknown is mixed with rea, the melting range of the mixture is 120-125 C.

Is it possible to identify the sample from this information? If not, what further tests would you perform?

I'm really kind of stumped because I have a feeling it's cinnamic acid but I don't know why it went down that much....

2007-10-09 04:56:42 · 3 answers · asked by Burnt Toast 1

And also, which would react to benedict's solution?

2007-10-09 04:56:26 · 1 answers · asked by heartiful 3

2007-10-09 04:18:22 · 6 answers · asked by Anonymous

2007-10-09 03:42:12 · 10 answers · asked by cernics221 1

NEED this fo tomorrow. please hlp

2007-10-09 03:15:14 · 1 answers · asked by Madiha 2

2007-10-09 02:54:52 · 1 answers · asked by ♥PurePoison♥ 3

2007-10-09 02:05:52 · 2 answers · asked by shadowfax . 2

such as hydrochloric acid.
I have to conduct an experiment to see if chaning the concentraition of an acid has an effect on the reaction of metals..like magenesium.

2007-10-08 21:48:26 · 3 answers · asked by Anonymous

Is there any other way other than the barrel method? I'm still unclear on how that is done... Can anyone tell me how to make charcoal accurately? Is there a way to make it on an electrical STOVE? Any feedback would be great!

2007-10-08 20:01:57 · 2 answers · asked by Anonymous

2007-10-08 18:56:26 · 1 answers · asked by Rajchem 2

Whats common oxidation numbers & Atomic Radius for Rubidium? and what are the units?

2007-10-08 18:43:00 · 1 answers · asked by WHAT 1

2007-10-08 18:33:57 · 2 answers · asked by snailtrail 1

In the past I used Nitric Acid to kill a few warts. Sure it burns like a lemon juice in a cut! But it does kill them fast! Are there any health risks by burning them with Nitric Acid? It did turn my skin brown...

And for all those movies buffs, it doesn't burn the instant you get it on you. It takes like 15 to 20 minutes...then it burns like white hot poker!

And if Nitric is out of the question, what other Acid beside the lame Salicydic acid that OTC products use?

2007-10-08 18:27:33 · 7 answers · asked by zebra105s 2

If Diet Coke is heated above 93 degrees fahrenheit for any amount of time, is it true that it's chemical composition turns into what is the equivalence of what we know as rat poison?

Fact or Fiction?

2007-10-08 18:21:18 · 4 answers · asked by Anonymous

Calculate the number of moles of oxygen gas produced from the complete catalyzed decomposition of 5.60ml sample of a 3.5% solution of H2O2. The density of the 3.5% solution of H2O2 is 1.01 g/ml.

2007-10-08 18:16:26 · 3 answers · asked by Anonymous

If I mix Nitrogen and Oxygen, will it be toxic?

If so, what could I add to reduce the level of toxicity? I'm also concerned that CO2 may be harmful if it is present. Should I be concerned about that or does it matter? Thanks

Thanks

2007-10-08 17:58:41 · 2 answers · asked by Mathematically Deficient 1

2007-10-08 17:54:13 · 2 answers · asked by John V 1

What is the purpose of the slot in the spectroscope
Im not sure but is it to observe the light and determine the emission spectrum?

2007-10-08 17:51:13 · 1 answers · asked by Anonymous

2007-10-08 17:50:41 · 3 answers · asked by ccutestuff2001 2

Help!
Mg emits radiation at 285 nm could the spectroscope be used to detect this emission. Explain.



Also if you know this questions it would be great...
If Boron emits radiation at 518 nm what color will Boron impart to a flame.

2007-10-08 17:50:21 · 2 answers · asked by Anonymous

hydrocarbon's can be identified as saturated or not by looking at how many single bonds are there in carbon..but how would I know if water is saturated or not?

2007-10-08 17:48:32 · 4 answers · asked by raida91 2

H3AsO4 + Zn = AsH3 + Zn (+2 charge)

2007-10-08 17:31:44 · 1 answers · asked by moviefan254 1

What is the balanced net ionic equation that illustrates the reaction between sodium bromate and bromide ions in an acidic medium yielding Br2 as the only halogen containing product?

2007-10-08 16:32:02 · 2 answers · asked by Kimmy D. 1

2007-10-08 16:23:41 · 3 answers · asked by Burnt Toast 1

2007-10-08 16:22:12 · 3 answers · asked by Anonymous

the compound X2O3 Is reduced by hydrogen according to the reaction: X2O3 + 3H2---------> 2X+3H20.

IF 9.30 g of X2O3 produce 3.64 g of h20, what is the element x?

2007-10-08 16:12:29 · 3 answers · asked by ccutestuff2001 2

the equation 2NA + 2H20---------> 2NAOH + H2. IF 7.2 grams of NA undergoes reaction with water and the resulting hydrogen is burned in oxygen to produce water, how many grams of water would be produce?


don't give me the answer please explain how to do it. i have seen other but i don't get an answer the professor provided. thanks!

2007-10-08 16:06:33 · 1 answers · asked by ccutestuff2001 2