chem wtf?

[imp0rt_tunerz]

where is the homework thread?

uhh and the last set of questions i swear :) & where is the homework thread :(

1146 joules of heat is released when a 100.0 gram sample of an unknown metal cools from 95.00°C to 65.00°C. Determine the specific heat of a metal.



a) 0.755 J/g oC

b) 1.22 J/g oC

c) .887 J/g oC

d) .3820 J/g oC



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Question 2 (Multiple Choice Worth 2 points)

A 2.00-kg metal object requires 5020 J of heat to raise its temperature from 20.0 °C to 40.0 °C. What is the specific heat capacity of the metal?

a) 126 J/(kg • C°)

b) 106 KJ/(kg • C°)

c) 126 cal/(kg • C°)

d) 142 kcal(kg • C°)



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Question 3 (Multiple Choice Worth 2 points)

The correct units for specific heat capacity:

a) J/oC

b) J/kg

c) J/kgoC

d) oC/kg



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Question 4 (Multiple Choice Worth 2 points)

A hot-water bottle contains 750 g of water at 65°C. If the water cools to body temperature (37°C), how many calories of heat could be transferred to sore muscles? (Note: Energy in living systems can be measured in the familiar unit of calories instead of Joules. Use 1.00 cal/g°C for the specific heat of water instead of 4.18 J/g0.)



a) 21000 cal

b) 2100 Joules

c) 200 kcal

d) None of the answers are correct



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Question 5 (Essay Worth 2 points)

Water is stored in a dam. When the sluice gates are opened, water rushes out and drives a turbine to produce electricity. How is the energy changing form in the process?


ALSO, MY SEMESTER EXAM WILL NEED TO BE TAKEN ON THE 22ND OR BEFORE THAN.... ITS BASIC HONORS HIGHSCHOOL CHEM (1ST SEMESTER STUFF)

I'LL PAY WHOEVER TAKES IT FOR ME.... NAME YOUR PRICE IT SHOULDN'T BE HARD AT ALL IF YOU KNOW YOUR STUFF.

gracias :)


i know... im such a slacker/cheater... but who cares :dunno: haha

[imp0rt_tunerz]

com'onnn sum1 please :)

[Mikey]

chemistry?


fuck that.

[imp0rt_tunerz]

ahhhhh


its 5 questions lol

[EXTREMUM]

chemistry?


fuck that.

Yeah, fuck that - I was a Computer Science major. :D

[verdugo09]

I want your body....................or some shit like that. :run: lol


Business is my thing

[Antonio]

solution:

1. get off the website.

2. go to school.

if it doesnt work:

-Get a tutor

[verdugo09]

solution:

1. get off the website.

2. go to school.

if it doesnt work:

-Get a tutor

best advice eva. Tho, is almost impossible to get a hold on those in my school.

[EXTREMUM]

solution:

1. get off the website.

2. go to school.

if it doesnt work:

-Get a tutor

This man speaks the truth...
































most of the time. :lawl:

[imp0rt_tunerz]

i do nothing in school. i have english and i get out at 12...

lol i have all my credits all done except that stupid class & another elective... im taking them online. & ITS TO MUCH TIME/FRUSTRATION TO TEACH YOURSELF THIS AFTER YOU'VE FAILED THE CLASS 2 YEARS AGO LOL

[verdugo09]

I feel your pain man, composition 2 bitch just told me I was not gonna make it.....................but it´s all good, I know she did it unjustly............damn redneck.


she is a true cracka

[imp0rt_tunerz]

haha skank english teachers.

[FBP EM1]

i cant believe I already forgot this, I just took my science final a day ago lol

[imp0rt_tunerz]

srdkljbnifnligudgndilugdgliudgnduil :( im gunna cry.

[VWcabiCHIK]

still need those answers?

[Boostjunkie]

srdkljbnifnligudgndilugdgliudgnduil :( im gunna cry.

Do it.:rofl:

[imp0rt_tunerz]

still need those answers?
ya i still need them :(

or like the formula on how to do them lol

[EXTREMUM]

ya i still need them :(

or like the formula on how to do them lol

While you're at it, find the formula, of how long it takes to defrost two whole wheat English muffins to perfection, in a 1kW GE microwave, at 1.7 cubic ft.

[EXTREMUM]

Nevermind, the answer is 57 seconds. :rofl:

[imp0rt_tunerz]

lmfao

[VWcabiCHIK]

ya i still need them :(

or like the formula on how to do them lol


E= hv=h(c/wavelength)

E= energy (joule=J or erg)
h=planck's constant= 6.63 x 10^-34 JxSec = 6.63 x 106-27 ergxsec
c= speed of light = 3.00 x 10^8 m/sec = 3.00 x 10^10 cm/sec
v= frequency (sec)
wavelength= m or cm or Å
1Å= 10^-8 cm = 10^-10 m

q= m x s x change in temp
q= heat transfer
m= mass
s= specific heat
change in temp = (initial-final)

i can't do the math for you now because i'm about to get ready for an office lunch, but i'll try to help you out later. i hope those formulas can help you out for now. those questions aren't that difficult.

[Maxi Patty]

English please! = P

[imp0rt_tunerz]

E= hv=h(c/wavelength)

E= energy (joule=J or erg)
h=planck's constant= 6.63 x 10^-34 JxSec = 6.63 x 106-27 ergxsec
c= speed of light = 3.00 x 10^8 m/sec = 3.00 x 10^10 cm/sec
v= frequency (sec)
wavelength= m or cm or Å
1Å= 10^-8 cm = 10^-10 m

q= m x s x change in temp
q= heat transfer
m= mass
s= specific heat
change in temp = (initial-final)

i can't do the math for you now because i'm about to get ready for an office lunch, but i'll try to help you out later. i hope those formulas can help you out for now. those questions aren't that difficult.


ahh thanks your the best :) im gunna to finish up my other modules and attempt to do this ::rolleyes:

[VWcabiCHIK]

no prob bob! glad i could be of service. were you able to figure it out?? :)

[imp0rt_tunerz]

not yet, i haven't attemped.... lol im doing all my "experiments" first... i have about 8 left, than i'll do that..

blah............. so much work

onto spanish projects =/

[VWcabiCHIK]

not yet, i haven't attemped.... lol im doing all my "experiments" first... i have about 8 left, than i'll do that..

blah............. so much work

onto spanish projects =/


ugh... highschool sucks!