Member of the Month

PartyBullshiit
March, 2024

Online

Welcome to the Newschoolers forums! You may read the forums as a guest, however you must be a registered member to post. Register to become a member today!

Chem homework anyone?

profile picture
tBatt
Posts: 9632 - Karma: 580
who wants to help me w/ my chem. i know the answer, but i have to find out how to set it up. factor label method

Click for larger image
Nov 18 2007 8:27PM
0 0
profile picture
martin.
Posts: 2115 - Karma: 34
we havnt learned how to do that...

bump, but seriously, look it up on wikipedia or google or somthing
Nov 18 2007 8:35PM
0 0
profile picture
jimmychung
Posts: 6857 - Karma: 25
5.00g CaC2 x (1mol CaC2)/(64g CaC2) x (1mol C2H2)/(1mol CaC2) = 0.078mol C2H2

the 5g of CaC2 is multiplied by 1mol of it over its molar mass, converting the units to moles of CaC2. the molar ratio of C2H2:CaC2 is 1:1, so 1mol C2H2 over 1mol CaC2 converts the units to moles of C2H2. multiplying through gives 0.078 moles of C2H2. this is all assuming that H2O is in excess and is not the limiting reactant.
Nov 18 2007 8:35PM
0 0
profile picture
skijunkiedtm
Posts: 9229 - Karma: 61
are you sure your not asain?
Nov 18 2007 8:36PM
0 0
profile picture
jimmychung
Posts: 6857 - Karma: 25
positive, i'm just a white NH kid who likes chem. trust me though, my major is fucking full of them!
Nov 18 2007 8:39PM
0 0
profile picture
Tinga
Posts: 11349 - Karma: 2,333
he is correct. its pretty easy stuff once you get stoichiometry down.
Nov 18 2007 8:40PM
0 0
profile picture
jimmychung
Posts: 6857 - Karma: 25
it's true, it can be a bitch at first, especially limiting reactants, but once you have a good teacher who can explain it well it's a breeze.
Nov 18 2007 8:41PM
0 0
profile picture
*DrewT*
Posts: 7768 - Karma: 480
haha dude if you have a hard problem with that you probably shouldn't bother taking chemistry
Nov 18 2007 8:45PM
0 0
profile picture
tBatt
Posts: 9632 - Karma: 580
ha i got every problem right besides that one out of like 15, i had it set up like the one kid did, but for some reason i got it wrong. maybe i typed shit into the calc wrong or something.

thanks for the help though. + karma for you.

Nov 18 2007 9:07PM
0 0
profile picture
user098123
Posts: 6072 - Karma: 18
Just a word to all of you kids in high school chem out there...if you are doing any kind of science or math major in college, PAY ATTENTION and learn the chem well. If you don't, you'll be fucked once you hit organic chemistry unless you know your stuff pretty well. Words of wisdom.
Nov 18 2007 9:13PM
0 0
profile picture
Pklink04
Posts: 5608 - Karma: 392
too all of you who enjoy chem, wait til you get to P.Chem
Nov 18 2007 10:01PM
0 0
profile picture
St.Steezy
Posts: 4228 - Karma: 20
been there slayed that
Nov 18 2007 10:03PM
0 0
profile picture
user098123
Posts: 6072 - Karma: 18
Ya I've heard P.Chem is a bitch...I'm a chem major which is kinda a pain in the ass cause my schedule is so hard. Chem/Chem Eng. majors at my university have the most rigorous course schedules of all majors haha so it kinda sucks. Orgo is kinda fun just alot of memorization. We'll see how P.Chem is next year, I've only heard bad things.
Nov 18 2007 10:12PM
0 0
profile picture
Mooose...
Posts: 1807 - Karma: 77
that was a hearty post
Nov 18 2007 10:17PM
0 0
All times are Eastern (-4)