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U smart? do this chemistry problem (pg. 2)
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| Heinz |
| quote: | Originally posted by whiskers
the answer is 42.
or ask trancepixie69 |
hmm.. howa bout no.
| quote: | Originally posted by butterfly
18.8 °C
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your correct.
but it had to be in Kelvin, and i rounded to the significant figure of 3 because the problem is made up of sig fig's of 3.
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P1=---- P2=-----
V1=31.4 mL V2=25.0 L
T1=23.6C T2=unknown
Using Charle's Law of Gas. Pressure must be constant. His formula is...
V1/T1 = V2/T2 (make into fraction.cant do on the keyboard.V1 OVER T1)
Formulate Equation to find V2 (volume)
31.4/23.6 = 25.0/T2
Cross-multiply
23.6(25.0) = 590 --------->> 590 = 31.4(T2)
590/31.4 = 18.8 = T2 = 18.8C
Convert Celsius measurement of 18.8C to Kelvin
273 + 18.8 = 291.8
Round
291.8 ---->> 292 K
Temperature in smaller tank is 292K or 18.8C |
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| Evil_Gnome |
| Psh, chemistry is a piece of . |
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| Noisician |
| quote: | Originally posted by Heinz
I was just doing homework for chem., and just thought of posting one of the problems up here, just to see if any of u smart ones can do it?? ive done it already and have the right answer, but can u do it??
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rofl, this is ing pathetic :stongue:
hey heinz, if you are so smart, could you please do my homework too? you see, i'm not as smart as you seem to be... so a little help from you would be greatly appreciated. except, it's a math problem i'm trying to resolve. but surely this is nothing for such a mastermind as yourself. right, heinz?
let a be an infinite set and let s be the class of all maps from a finite ordinal to a (i.e. the class of all finite a-strings). prove
1) s is not a proper class, i.e. s is a set.
2) a and s are equipollent.
please help me, dr. brain! |
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| Boomer187 |
forget those simple problems...help me on my homework.
How can you measure level of superstitious belief?
yes, and inherent in that question is defining superstition....good luck. |
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| DigiNut |
| quote: | Originally posted by Boomer187
forget those simple problems...help me on my homework.
How can you measure level of superstitious belief?
yes, and inherent in that question is defining superstition....good luck. |
Why Boomer, you can just give them this Nifty easy e-quiz! Online quizzes can tell you everything about people, including which Pulp Fiction character they would be if they were a Pulp Fiction character, which Great Leader they would be if they were a Great Leader, what kind of lover they are, what precise time and date they're going to die and how, and even the most intimate details of their personality and temperament!
You being in psychology and all, I'm shocked that you didn't already know this! :haha: |
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| nchs09 |
| quote: | Originally posted by whiskers
the answer is 42.
or ask trancepixie69 |
:stongue: :stongue: :stongue: :stongue: :stongue: :stongue: :stongue: :stongue: :stongue: :stongue: :stongue: :stongue: :stongue: |
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| colonelcrisp |
charles law is significantly flawed as pressure IS NOT CONSTANT. you can solve it using bernoulli's equation for fluid mechanics or the First law of thermodynamics for closed systems. the solution doesnt result in 18.2 degrees however. and is significantly more complicated. and since i am studing for my fluids exam... i really dont have the time to draw out a solution to that one:D
good luck with that chem tho |
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| Lephaid |
| quote: | Originally posted by DigiNut
Why Boomer, you can just give them this Nifty easy e-quiz! Online quizzes can tell you everything about people, including which Pulp Fiction character they would be if they were a Pulp Fiction character, which Great Leader they would be if they were a Great Leader, what kind of lover they are, what precise time and date they're going to die and how, and even the most intimate details of their personality and temperament!
You being in psychology and all, I'm shocked that you didn't already know this! :haha: |
:happy2: |
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| caddyshack |
| quote: | Originally posted by Heinz
I was just doing homework for chem., and just thought of posting one of the problems up here, just to see if any of u smart ones can do it?? ive done it already and have the right answer, but can u do it?? here it is....
A tank of compressed carbon dioxide has a temperature of 23.6C and a volume of 31.4 L. The carbon dioxide is completely transferred into a smaller tank that has a volume of 25.0 L. Assuming none of the carbon dioxide escapes during the transfer, what is the tempreature of the carbon dioxide in the smaller tank if the temperature is lowered to achieve the same pressure as in the larger tank??
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HINT: Must know the Boyle's / Charles Gas Laws
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Another one. This one is easier...
What will be the volume of a gas sample at 309K if its volume at 215 is 3.42 L? Assume the pressure is constant.
HINT: Must know the laws of gas.
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why would you brag about high school chem courses? offer a challenge, behold:
compute the remainder of (2004)^(2005) when divided by 23 |
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| Boomer187 |
| quote: | Originally posted by DigiNut
Why Boomer, you can just give them this Nifty easy e-quiz! Online quizzes can tell you everything about people, including which Pulp Fiction character they would be if they were a Pulp Fiction character, which Great Leader they would be if they were a Great Leader, what kind of lover they are, what precise time and date they're going to die and how, and even the most intimate details of their personality and temperament!
You being in psychology and all, I'm shocked that you didn't already know this! :haha: |
there goes my dissertation out the window.
damn it, now I must start career backup plan 13..... |
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| Noisician |
| quote: | Originally posted by caddyshack
why would you brag about high school chem courses? offer a challenge, behold:
compute the remainder of (2004)^(2005) when divided by 23 |
hmmm... let's see. my first take on this one:
you can easily show that 2004 and 23 are coprime (i.e., ∃m,n∈Z s.t. 2004m+23n=1). and since 23 is a prime, then by fermat's little theorem
2004^22 ≡ 1 (mod23)
then
(2004^22)^91 ≡ 2004^2002 ≡ 1 (mod23)
after playing with euler's phi-function for a while, we get
2004^3 ≡ 4 (mod23)
so by modular arithmetic
2004^2005 ≡ 4 (mod23)
is 4 the right answer? |
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| Mebot |
| quote: | Originally posted by Noisician
rofl, this is ing pathetic :stongue:
hey heinz, if you are so smart, could you please do my homework too? you see, i'm not as smart as you seem to be... so a little help from you would be greatly appreciated. except, it's a math problem i'm trying to resolve. but surely this is nothing for such a mastermind as yourself. right, heinz?
let a be an infinite set and let s be the class of all maps from a finite ordinal to a (i.e. the class of all finite a-strings). prove
1) s is not a proper class, i.e. s is a set.
2) a and s are equipollent.
please help me, dr. brain! |
hahaha owned!
I know you're pretty good in math (obviously) but didnt you say that you were in a national math challenge or something one year? You said it was like only 3 problems and you figured out the last one a week later or something..
What were those math problems like? |
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