Chemistry (Science & Mathematics) - March 2007

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You see a crowd of gulls fighting over an object on the wet sand at the ocean's edge. You investigate. The....

object is a vase-shaped, pink blob about as round as a dinner plate. How will you decide if it is a living thing?

2007-03-18 06:22:40 · 3 answers · asked by Right here Right now 1

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How did Louis Pasteur's experiment show that bacteria do not arise spontaneously in broth?

2007-03-18 06:20:16 · 3 answers · asked by Right here Right now 1

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What was the mass of alcohol? Details Below.?

A certain mass of pure grain alcohol at a temperature of 25C is mixed with 200 grams of water at 75C. The final temperature of the mixture is 50C.
Given- Water 4.18 J.(grams perdegress)C, 1.00 cal/(G per degress C)
Grain Alcohol- 2.4 J, .58 cal

Please Help with Colrimetry problem.
Grain Alcohol- 2.3 J

2007-03-18 06:02:32 · 1 answers · asked by Anonymus 2

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What does colloidal mean?

In the subject chemistry you have three types of mixtures you have suspension, colloidal and solution. i am trying to find out what colloidal means

2007-03-18 05:54:46 · 2 answers · asked by sweetie 1

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Emulsion question?

Why is it that detergent, oil and water does not create emulsion, but bleach oil and water does?

2007-03-18 05:44:24 · 1 answers · asked by aznboardergirl 3

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What are some things that are flammable?

2007-03-18 05:31:14 · 10 answers · asked by Alice 3

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Beryllium project help!?

for my project, I have to "Adopt An Element" and I have to make up a cost for a certain amount. Any ideas? I don't understand. Please help.

x

2007-03-18 05:28:46 · 3 answers · asked by Nikki [fer sure] 1

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You see a crowd of gulls fighting over an object on the wet sand at the ocean's edge. You investigate. The....

object is a vase-shaped, pink blob about as round as a dinner plate. How will you decide if it is a living thing?

2007-03-18 05:10:53 · 2 answers · asked by Right here Right now 1

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What is alluminium coating?

2007-03-18 05:09:03 · 5 answers · asked by Anonymous

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How did Louis Pasteur's experiment show that bacteria do not arise spontaneously in broth?

2007-03-18 05:07:19 · 1 answers · asked by Right here Right now 1

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PH of of a buffer solution? What am I doing wrong?

Alright so this is a question for an assignment I have to do online. When inputting my answer it is telling me it is wrong and I re-did my numbers and I keep getting the same answers, so I am assuming my process may be wrong. Please tell me if you can identify what I am doing wrong.

Question: Calculate the pH of 800.0 mL of solution containing 19.0 g of CH3COOH and 25.0 g of CH3COONa.

So I calculated my concentration values by figuring put the molar mass ands than dividing by 0.8 L. Therefore CH3COOH = [0.395] and CH3COONA = [0.381].

So I assumed that CH3COO- is going to be [0.381] because CH3COONA dissociates completely because it is a weak acid. So my ice table looks like this:

CH3COOH --> CH3COO- + H+
0.395 0.381 O
- x +x + X

So I solved for H+ and got 1.8 times 10 to the negative 5. So I calculated OH value by using KW value of 1E - 14. And than used Ph = -log ( ). I got 9.26 Is it correct?

2007-03-18 05:02:55 · 1 answers · asked by Sgt. Pepper 2

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