Chemistry - October 2007

50.0 mL of 0.022 M C6H3COOH(aq) and 20.0 mL of 0.032 M NaC6H5CO2(aq)?

2007-10-05 05:11:19 · 1 answers · asked by Sarah babe 1

2007-10-05 04:36:32 · 5 answers · asked by hannahlco 2

47 km= ______ m??

2007-10-05 04:24:47 · 5 answers · asked by Anonymous

78.915 mg=______ g

2007-10-05 04:24:06 · 3 answers · asked by Anonymous

492 cm =______ mm?

2007-10-05 04:22:33 · 2 answers · asked by Anonymous

A. nuclear disintegration.
B. nuclear separation.
C. nuclear fission.
D. nuclear fusion.

2007-10-05 03:51:07 · 4 answers · asked by Anonymous

The specific heat of water is 1.00 cal/g-°C.

2007-10-05 03:32:23 · 3 answers · asked by Anonymous

How many grams of acetic acid (C2H4O2) would you use to make 10 L of 0.1 M aqueous solution

(Note: Atomic masses, in daltons are approximately 12 for carbon, 1 for hydrogen, and 16 for Oxygen)

Which is it?
a.) 10 grams
b.) .1 grams
c.) 6 grams
d.) 60 grams
e.) .6 grams

2007-10-04 22:36:14 · 3 answers · asked by luckee137 2

2007-10-04 22:09:29 · 3 answers · asked by young dubb 1

For the following question use the general periodic trends you learned in class, not the experimental values from the figures in the text.

a) Which of the following elements has the largest first ionization energy?

Na Al Si Mg

b) Which of the following has the Largest atomic radius?

Po Ba Bi Pb




You must enter both answers to the above questions with ONE and ONLY ONE space between each.
e.g., a correct answer format would be C Pb

2007-10-04 20:54:34 · 1 answers · asked by gotMUNCH 2

2007-10-04 18:21:31 · 2 answers · asked by lil bill 7 2

Use this equation:
C(subscript 2)H(sub 6)O +3O(sub 2) ------- 2CO(sub 2) +3H(sub 2)O

If 135g of ethanol are combusted with 101g O(sub 2), what is the mass (grams) of carbon dioxide released into the atmosphere? It is multiple choice, but I just want to know how to do the problem.
Thanks for your help!

2007-10-04 18:17:12 · 2 answers · asked by lil bill 7 2

2007-10-04 15:42:21 · 3 answers · asked by Anonymous

1)Calculate the normality of a solution that was prepared by dissolving 43.3 g of barium hydroxide in enough water to make 2160.0 mL of solution.

2)Balance the following equations:
MnO4- (aq) + H+ (aq) + Br- (aq) --> Mn2+ (aq) + Br2 (l) + H2O (l)

MnO4- (aq) + H2O (l) + NO2- (aq) --> MnO2 (s) + NO3- (aq) + OH- (aq)

3) Balance the following equation for a reaction in acidic solution. Only H+ or H2O may be added.
Cl2(g) --> ClO3-(aq) + Cl-(aq)

4)The following reaction occurs in basic solution. Balance it by adding only OH- or H2O.

N2H4(aq) + Cu(OH)2(s) --> N2(g)+ Cu(s)

5) Oxygen gas can be generated by heating KClO3 in the presence of some MnO2.
2KClO3 --> 2KCl + 3O2

If all the KClO3 in a mixture containing 2.07 g KClO3 and 0.30 g MnO2 is decomposed, how many liters of O2 gas will be generated at T = 28.0oC and P = 754.8 torr?

THANK YOU!!!!!

2007-10-04 15:28:08 · 1 answers · asked by ^Blue Rose^ 3

A sample of gaseous SO3 was introduced into an evacuated flask so that the pressure of pure SO3 would be 0.4800 atm at 525 K.
But, SO3 decomposes to gaseous SO2 and O2.
At equilibrium the TOTAL pressure in the flask was measured at 0.6048 atm. Calculate Kp at this temperature for the reaction

SO3(g) ↔ SO2(g) + 1/2 O2(g)

2007-10-04 15:25:39 · 1 answers · asked by mimi 1

I am wondering how and/or why specific molecular structure affects the way odor is processed in the human body.

Specifically, is the structure of aldehydes unique from the other odiferous compounds (esters, ketones, phenols, and any other groups of compounds), which in turn causes the body to process the compound differently than the other compounds?

Is there a group of compounds that are very close to aldehydes? If so, what are common sources of that compound found in the everyday world?

Why would a person be physically irritated by aldehyde-based odors, but not others?

I am a lay person, without chemistry knowledge, so I am not well-versed in terminology and explinations are helpful.

2007-10-04 15:21:59 · 1 answers · asked by Tapas 3

2007-10-04 15:09:35 · 2 answers · asked by volcomstar_77 2

Calculate the molarity of caffeine in a 12 oz cola drink containing 28.7 mg of caffeine, C8H10N4O2. (1oz = 29.6 mL)

2007-10-04 15:08:59 · 2 answers · asked by Anonymous

2007-10-04 15:03:18 · 3 answers · asked by SeXxY&SmArT 2

Find the Molarity of the following

1. 2.5 grams of NaOH in 1 Liter.

2. 25 grams of HCl in 250 mL

3. 10 grams of KOH in 5 Liters

4. 4.5 grams of CaCl2 in 125 mL.

5. 30 grams of NH4OH in 2 Liters

6. 10 grams of MgCl2 in 1 Liter

7. 15 grams of NaCl in 100 mL

8. 5 grams of Calcium in 1 Liter

9. 20 grams of KI in 500 mL

10. 2 grams of CaSO4 in 2 Liters.

2007-10-04 14:48:41 · 1 answers · asked by blueeyegreen 1

doin a report bout gold....

answer plz thanks.

2007-10-04 14:45:35 · 1 answers · asked by Jazz 1

how do the names of covalent compounds differ from the names of ionic compounds???

2007-10-04 14:45:34 · 1 answers · asked by lellypopppsss :) 4

where are the valence electronc in an atom?

2007-10-04 14:39:10 · 4 answers · asked by lellypopppsss :) 4

Who knows the exact specific name of the line that is shaped like a stair case in the Periodic Table of Elements? I'm not looking for the name of the elements that are near it but the actual name for the staircase itself. Thanks

2007-10-04 14:32:31 · 2 answers · asked by iLovePhysics 1

trying to find out the mupltiple ions gold forms.

plz answer thanks guys.

2007-10-04 14:30:45 · 3 answers · asked by Jazz 1

Balance the following equation for a reaction in acidic solution. Only H+ or H2O may be added. Enter your answer as the sum of the coefficients.


Cl2(g) --> ClO3-(aq) + Cl-(aq)

2007-10-04 14:22:17 · 1 answers · asked by Anonymous

Please give me a procedure and an observation, if you can give me pictures, better! tnx.

2007-10-04 14:22:03 · 2 answers · asked by Anonymous

A gas-filled weather balloon with a volume of 58.4 L is released at sea-level conditions of 755 torr and 23°C. The balloon can expand to a maximum volume of 831 L. When the balloon rises to an altitude at which the temperature is -5°C and the pressure is 0.075 atm.

a.) Will it reach its maximum volume?
b.) What is the final volume of the balloon in Liters?

2007-10-04 13:58:19 · 1 answers · asked by jvt022285 1

A compound contains only C, H, and N. Combustion of 28.0 mg of the compound produces 26.8 mg CO2 and 32.9 mg H2O. What is the empirical formula of the compound? (Type your answer using the format CO2 for CO2.)

2007-10-04 13:55:30 · 1 answers · asked by My point exactly 5

what is Phenylalanine? where is it found in? what it use for? wat are the affects (good/bad) on human?
I needed in simple words so i can understand cuz i can just research it myself if u gona post a science text from a website. So please help if u can
-thank you-

2007-10-04 13:44:16 · 7 answers · asked by Anonymous