Chemistry - January 2007

2007-01-31 12:03:18 · 5 answers · asked by Anonymous

5g of copper was heated in the presence of oxygen under a bunsen burner. 1g of carbon was added to the result and heated again, which gave copper + co2
2 questions:
1. What is the name of the product obtained through the first reaction and what is the chemical formula?
2. Is that equation correct:
Cu + O = CuO
2(CuO) + C = CO2 + 2Cu

2007-01-31 12:02:02 · 4 answers · asked by Jim R 1

2007-01-31 12:00:32 · 0 answers · asked by Anonymous

2007-01-31 11:43:36 · 4 answers · asked by Lightning 1

plllleaaaaaaseeee help me out.

2007-01-31 11:20:39 · 4 answers · asked by Anonymous

lab work..

2007-01-31 11:12:09 · 6 answers · asked by Armand P 2

For the following combination of reactants, enter the formula of the products and give their physical states.

A. BiCl5(aq) + Na2S(aq) ->


B. NaI(aq) + Cl2(g) ->


C. CdSO4(aq) + SrS(aq) ->

2007-01-31 10:58:33 · 1 answers · asked by rsb 1

I really need a good idea for a future research project. I would like it to be chemistry related but if you have any other suggesions that are great, please let me know. I am completely cluless on what to do. I would also like it to be probably at a college level and have a significant purpose. Please, anything would be great...

2007-01-31 10:55:14 · 1 answers · asked by lala bobo 2

what kind of bond is sodium hydroxide - S(OH), calcium floride - CaF, zinc iodine - ZnI, potassium sulfate - K(SO4), Ammonium oxide - (NH4) O, and Iron Carbonate? i just need to know if they are ionic or covalent.

thanks

2007-01-31 10:45:18 · 1 answers · asked by Anonymous

How long would it take, in minutes, for the person in the above question to walk off all the calories in the one brownie ? Walking requires energy equal to 2.5 times the basal metabolic rate.

Do NOT consider the energy needed to digest, absorb, and metabolize the snack itself, which the text describes as 10% of the ingested amount of food. Use the total amount of the energy in the one brownie in your calculation.

2007-01-31 10:34:23 · 2 answers · asked by Katie 1

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2007-01-31 10:33:56 · 1 answers · asked by Carlos H 1

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2007-01-31 10:32:51 · 3 answers · asked by Carlos H 1

2007-01-31 10:06:59 · 1 answers · asked by mario h 1

When 1 mole of methane is burned at constant pressure, -890 KJ/mol of energy is released as heat. If a 2.16 g sample of methane is burned at constant pressure, what will be the value of Delta H?

2007-01-31 10:04:01 · 1 answers · asked by Rachel L 1

I am struggling over what an aluminum element and an carbon element have in common. I can't find the answer anywhere. PLEASE HELP ME!

2007-01-31 09:59:33 · 3 answers · asked by Anonymous

I need help to the find the molarity (M) of an HCl solution made from diluting 9.0 mL of 8.0 M HCl to a new volume of 50.0 mL. If anyone could help, I would really appreciated it. Thanks in advance.

2007-01-31 09:58:05 · 4 answers · asked by ash 1

which is the stronger acid? trichloroacetic acid or trifluoracetic acid? and why

2007-01-31 09:55:10 · 3 answers · asked by nik 1

2007-01-31 09:48:24 · 3 answers · asked by dial9_1_1 1

If a tank of water is being drained at a rate of 12.0 cm3/sec, what is the rate in liters/min ?
10-3 m3 = 1 L

2007-01-31 09:43:44 · 3 answers · asked by garture 1

I NEED IT FOR A PROJECT!!!!!HELP!!!!!!!!

2007-01-31 09:43:32 · 1 answers · asked by Brianna 2

how you figure? :D

2007-01-31 09:43:27 · 1 answers · asked by Christy 2

In the following calculation


(((5.70x11.41) - 7.2356) /0.053) + 1


the number 1 is defined as exact. Give the correct answer to this calculation with the correct number of significant figures.

2007-01-31 09:43:02 · 3 answers · asked by garture 1

2007-01-31 09:18:24 · 6 answers · asked by Anonymous

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2007-01-31 08:30:32 · 6 answers · asked by Anonymous

What do these three elements have in common.... properties ct....

2007-01-31 08:17:04 · 1 answers · asked by Anonymous

2007-01-31 08:12:56 · 8 answers · asked by TREVOR K 1

2007-01-31 08:07:49 · 2 answers · asked by chanel_mitchell06 2

2007-01-31 07:42:36 · 20 answers · asked by Anonymous

I must me misinterpreting something here. Matter can't be created, but isn't that what is going on when an animal/plant/ect. grows?

2007-01-31 07:24:38 · 10 answers · asked by James 5

What is the density in g/L of carbon dioxide gas at 7.40 × 102 torr and 37.0ºC? (Molar mass of carbon dioxide = 44.0 g/mol.)

2007-01-31 07:08:24 · 3 answers · asked by MEB 2