Chemistry - November 2006

57) A compressedd air-tank carried by scuba divers has a volume of 8.00 L and a pressure of 140 atm at 20'C. What is the volume of air in the tank at 0'C and 1.00 atm pressure (STP) ?

60) A sample of oxygen produced in a laboratory experiment had a volume of 590 mL at a pressure of 775 mm Hg and a temp of 352 K. What is the volume of this sample at 25 'C and 800.0 mm Hg pressure?

Avogadro's Law & Standard Molat Volume

65) How many moles of gas are in a volume of 48.6 L at STP?

68) What is the mass of CH4 in a sample that occupies a volume of 16.5 L at STP ?

69) Assume that u have 1.75 g. of deadly gas hydrogen cyanide, HCN. What is the volume of the gas at STP ?

Ideal Gas Law

76) If 2.3 moles of He has a volume of 0.15 L at 294 K, what is its pressure in atm?

78) If 15.0 g of CO2 gas has a volume of 0.30 L at 310 K, what is its pressure in mm Hg?

2006-11-24 13:59:54 · 6 answers · asked by femylatina 1

with 0.0100 M EDTA.Calculate pNi at (a)50% (b)100% (c)200% titration

logKNi=18.6
alphaY=10^-2.2

2006-11-24 13:47:30 · 1 answers · asked by Anonymous

please and thankyou

2006-11-24 13:35:57 · 2 answers · asked by Savannah & Co 1

2006-11-24 13:15:48 · 4 answers · asked by Maria S 1

locations

2006-11-24 12:55:31 · 7 answers · asked by Anonymous

2006-11-24 12:51:22 · 5 answers · asked by Anonymous

I have a quick question and would like some tips as to how to tell a compound as to whether it would dissolve more in water or gasoline. Such as Choloroform(CHCl3), Na2SO4, KCl, and BaSo4

I would greatly appreciate anyone's help with this!

2006-11-24 12:50:08 · 4 answers · asked by Anonymous

1.How would you distinguish sodium chloride (table Salt) from sodium Iodide (a Poison)? Show Reactions.
2.How could you distinguish solid barium chloride from solid barium sulfate
3.Do you think that washin soda, Na2CO3, could be used for the same purpose as baking soda, NaHCO3? Would Na2CO3 react with HCL. Write the Chemical Equation for the reaction of NaHCO3 with HCL

Can any1 please help me with this.....?

Thanks in advance

2006-11-24 12:04:58 · 2 answers · asked by Anonymous

__CA + __H2O yields __Ca(OH)2 + __H2

2006-11-24 12:01:53 · 7 answers · asked by luc_allmon 2

SO2 + O2 → SO3
If the percent yield of the above reaction is found to be 92.80 %, how many grams of SO3 are produced from the complete reaction of 160.00 g of O2 ?

2006-11-24 11:56:33 · 5 answers · asked by Christie 1

__KHCO3 + __H3PO4 yields __K2HPO4 + __H2O + __CO2

Can you solve it? Show your work please...

2006-11-24 11:50:28 · 6 answers · asked by luc_allmon 2

2006-11-24 11:45:48 · 8 answers · asked by Sam's Club 1

C5H5N + H2O &harr: C5H5NH+ + OH−



a) This is an example of an ionization reaction




Pb2+(aq) + 2I−(aq) → PbI2(s)



b) This is an example of a neutralization reaction



c) The product is an ionic compound




CH3CH2Br + OH- → CH3CH2OH + Br-



d) This is an example of a substitution reaction



e) Double bonds are formed in the product

2006-11-24 11:28:42 · 4 answers · asked by Christie 1

Nitric oxide, NO, reacts instantly with oxygen gas to give nitrogen dioxide, NO2, a dark brown gas.
In one experiment 19.13 g of NO is mixed with 12.75 g of O2.

What is the theoretical yield of NO2 ? I.E., how many grams of NO2 should be formed

2006-11-24 11:27:12 · 3 answers · asked by Christie 1

2006-11-24 11:02:53 · 4 answers · asked by mrs_reptile2000 1

2006-11-24 11:00:49 · 8 answers · asked by mrs_reptile2000 1

2006-11-24 10:40:52 · 10 answers · asked by Anonymous

gas ---> solid

2006-11-24 10:21:05 · 10 answers · asked by Shippo2wolf 2

I'm doing a project in school and we're making root beer and I am kind of confused. Are there specific types of fermentation?!

2006-11-24 10:15:11 · 3 answers · asked by Katz 2

2006-11-24 10:13:03 · 3 answers · asked by ibid 3

what is the use of soap suds and how there made?

2006-11-24 10:01:37 · 0 answers · asked by Anonymous

I took a chemistry test. There was this one question that ahs been bothering me all week. this question was:

If hydrogen atom goes from energy level n=3 to n=1 what is the number of spectrum line produced(something like that)?

Answers
a. 1
b. 2
c. 3
d. infinity

-I answered c. 3

2006-11-24 09:53:56 · 6 answers · asked by avalentin911 2

2006-11-24 09:45:35 · 3 answers · asked by Deez nuuts 1

2006-11-24 09:16:28 · 3 answers · asked by curlash 1

2006-11-24 08:52:42 · 7 answers · asked by curlash 1

2006-11-24 08:46:32 · 8 answers · asked by curlash 1

i am doing a science project on copper & need to make a poster in the shape of something copper that is creative

2006-11-24 08:35:35 · 11 answers · asked by Anonymous

2006-11-24 08:30:03 · 2 answers · asked by Tope D 1

2006-11-24 08:20:41 · 4 answers · asked by STORMY K 3

2006-11-24 08:17:45 · 1 answers · asked by r31241 1