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Please help me ASAP! prelim chem help (1 Viewer)
- Thread starter turntaker
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madharris
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n=m/M
number of moles = mass/Molar mass
^H=-mC^T
H = heat energy
m= mass
c = specific heat (usually water I think? which is like 4.186 iirc)
delta t = change in temperature (= final - initial temp)
c=n/v
c = concentration
n = number of moles
v = volume
C1V1=C2V2
C1 = Concentration 1
C2 = Concentration 2
V1 = Volume 1
V2 = volume 2
What I usually did when I was lost was write out what I had from the information
e.g. if a question was asking me to find the mass of something.
then in the question I might have a c, and might have had a v.
Then I would figure out which equations this would fit in, so I would calculate an n once I figured that out.
Then I would look, what equation also has an n and has m? and that would be n=m/M
So I would figure out M, rearrange the equation and calculate.
Wow that probably made no sense.. sorry. hahaha. I'm procrastinating from my own study
number of moles = mass/Molar mass
^H=-mC^T
H = heat energy
m= mass
c = specific heat (usually water I think? which is like 4.186 iirc)
delta t = change in temperature (= final - initial temp)
c=n/v
c = concentration
n = number of moles
v = volume
C1V1=C2V2
C1 = Concentration 1
C2 = Concentration 2
V1 = Volume 1
V2 = volume 2
What I usually did when I was lost was write out what I had from the information
e.g. if a question was asking me to find the mass of something.
then in the question I might have a c, and might have had a v.
Then I would figure out which equations this would fit in, so I would calculate an n once I figured that out.
Then I would look, what equation also has an n and has m? and that would be n=m/M
So I would figure out M, rearrange the equation and calculate.
Wow that probably made no sense.. sorry. hahaha. I'm procrastinating from my own study
faisalabdul16
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Lel
Queenroot
I complete the Squar3
And always write a balanced equation if one hasn't been provided.
Queenroot
I complete the Squar3
It's okay, you're only in prelims
turntaker
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Yeah.. Hopefully this won't happen next term/year.. Gotta get that 90+ atar
seventhroot
gg no re
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just drop it then if > 10 units
turntaker
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No I know I can do well in chemistry. I just didn't put the effort in at all.
seventhroot
gg no re
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okay fair enough; best of luck
someth1ng
Retired Nov '14
Chemistry isn't one of those subjects where you can completely forget year 11 content, you should revise it during the holidays.