Chemistry - January 2007

Propionic acid, CH3CH2COOH, has a Ka of 1.6x10^-6. What is the pH of a solution containing 0.5 M CH3CH2COOH (undissociated) and 0.5 M CH3CH2COO- (propionate ion)? [ such a solution can be made by adding sodium propionate to a solution of a propionic acid. ]

2007-01-08 10:10:33 · 1 answers · asked by Anonymous

Even though lead is toxic, many lead compunds are still used as paint pigments. What volume of 1.50mol/L lead(II) acetate contains 0.400 Pb ions.

2007-01-08 10:00:33 · 2 answers · asked by nicofara 1

1.A bungee cord is stretched to twice its length. What changes? Its mass? volume? density?

2. Two shoe boxes are identical in size. One contains beans and the other contains popcorn. What is the same and what is different? Mass? Volume? Density?

3. Besides shape, what is different between a 300 gram rectangular lock of copper and a 300 gram round ball of copper? Mass? Volume? Density? Explain your reasoning.

Thank you sooo much in advance!! :)

2007-01-08 09:54:02 · 7 answers · asked by Aanchi11 2

help with substitution, elimination, conformational analysis, stereoisomerism and general reaction chemistry. All help much appreciated.

2007-01-08 09:50:56 · 5 answers · asked by Michael W 2

physical science

2007-01-08 09:43:12 · 3 answers · asked by Reagan B 1

Also the difference of heterogenous and homogenous and what compound is. Pleasemake it simple to understand and it would be appreaciated if examples were given.

2007-01-08 09:40:04 · 8 answers · asked by Iron Dragon 2

convert 109.3 degrees farrenheit to celcius

2007-01-08 09:29:05 · 4 answers · asked by susan 2

Where is Isopropyl alcohol on the pH scale??(base)
Which one is close to a base on the pH scale?
Water, saline solution, pepto-bismol & alka-seltzer && whatever one is closer which what is the pH number?

Also on the pH scale where is Hydrogen peroxide (acid)??



I just need the number so I know where to put it thank you guys.

2007-01-08 09:09:17 · 2 answers · asked by queenpravato 1

ok help on balancing chemical equation!! H2S+O2=H2O+SO2! i dont get how to do this one and need it for tom.!!! i really need help bc my homework is already late a day and i just dont get it

2007-01-08 09:06:09 · 3 answers · asked by sweetie 1

2007-01-08 09:05:24 · 1 answers · asked by Anonymous

What happens to sodium chloride, potassium nitrate and calcium hydroxide after being cooled? (Well, first they were heated and then cooled)

2007-01-08 08:57:48 · 1 answers · asked by untilyoucamealong04 3

...this question is intended for someone in specific, but feel free to answer!! iheartanswers. =) && i am s-o-o confused.

2007-01-08 08:54:31 · 1 answers · asked by ♥..raachel!* 1

please tell why if possible!

2007-01-08 08:53:15 · 2 answers · asked by Anonymous

Im just tring to get some ideas for a science project.

2007-01-08 08:05:56 · 7 answers · asked by sheriquaj 1

S C I E N C E F A I R ! this is for that little-kid floating an egg project! need answers A-SAP!

2007-01-08 08:05:04 · 2 answers · asked by ♥..raachel!* 1

A) Ce+3
B) K0
C) Ne0
D) S-2

2007-01-08 07:58:02 · 3 answers · asked by frickenawesomekoreanandyouknowit 2

A) 92U235
B) 92U239
C) 93Np239
D) 94Pu239

2007-01-08 07:50:26 · 5 answers · asked by frickenawesomekoreanandyouknowit 2

2007-01-08 07:47:34 · 6 answers · asked by frickenawesomekoreanandyouknowit 2

2007-01-08 07:45:44 · 3 answers · asked by frickenawesomekoreanandyouknowit 2

2007-01-08 07:43:07 · 2 answers · asked by frickenawesomekoreanandyouknowit 2

tankoo

2007-01-08 07:34:44 · 32 answers · asked by Anonymous

2007-01-08 07:32:53 · 3 answers · asked by Anonymous

threonine is an amino acid

2007-01-08 07:29:09 · 3 answers · asked by Anonymous

Please reference your answers with links to papers, journals, articles, etc.

2007-01-08 07:25:11 · 2 answers · asked by discoganya 2

2007-01-08 07:24:26 · 6 answers · asked by wabbitslay3r 1

2007-01-08 07:15:43 · 2 answers · asked by Anonymous

wax, candy, plastic, lead, aluminum, copper, halite(NaCl), quartz, marble, and corundum

2007-01-08 07:13:59 · 2 answers · asked by AHHHH 2

What is the oxidation state of the potassium in K2O

2007-01-08 07:06:26 · 2 answers · asked by cetinnovations 1

2007-01-08 07:05:01 · 6 answers · asked by furlong 29 1

NO(g)+MnO4(aq)----NO3(aq)+MnO2(s)

2007-01-08 07:03:50 · 2 answers · asked by NOMHLE N 1