Homework Help v1.3 - Page 6

batman555 · 28-11-2005, 04:45 AM

Aww...if you were talking about chemistry, there are separate half-life equations for different types of reactions (ie, zeroth order, first order, second order, etc.)

pkzild · 28-11-2005, 04:48 AM

its easier if you just use the generic exponential growth/decay formula

y(t) = y0*e^kt

where t is time
y0 = initial amt
k = constant

works for half/double/everything inbetween life

**ShadowNIN** · 28-11-2005, 08:22 AM

genictis is a hard class but u should try out accounting recievable take so loooooooooooooong to do

R)X(Z · 28-11-2005, 05:56 PM

hmm After seeing this Logarithm thingy ^^"
Can someone give me a hmm site for learning the basic? I found it too be very instresting ^^" although It's problay too early for me, still ^^" (only 14 heh)

canza · 29-11-2005, 01:33 AM

Can anyone help me balance this? C

H

+O(2)=CO(2)+H(2)O
And can you show me step by step or like an easier way to do this? There is one, but I forgot. Something about having one side as 1 coefficient and then the other side you solve using multiplication and stuff.

pkzild · 29-11-2005, 01:36 AM

yo those things are easy as hell you have to balance H and O last so balance C's first and then H's and O's

wait till you do oxidation/reduction or anything harder method of balancing...

batman555 · 29-11-2005, 01:38 AM

Quote:

Originally Posted by canza

Can anyone help me balance this? C

H

+O(2)=CO(2)+H(2)O

And can you show me step by step or like an easier way to do this? There is one, but I forgot. Something about having one side as 1 coefficient and then the other side you solve using products.

I got:

C

H

+ 15/2O(2) --> 6CO(2) +3H(2)O

For combustion reactions, balance the carbons first. Then the hydrogens, and then the oxygens.

For general chemical reactions, balance the element that is the least common in your equation. Usually, hydrogens and oxygens are balanced last.

canza · 29-11-2005, 01:45 AM

Oh but the answer on the book is different from yours. It says: 2C

H

+15 O(2)=12CO(2)+6H(2)O

*Denny Crane* · 29-11-2005, 01:52 AM

^multiply her answer out by two and you get that

in thermochemical equations, you leave the unit of the hydrocarbon as 1 mole and alter the rest to suit

canza · 29-11-2005, 01:54 AM

oooo ok lol from first glance I can tell that it was confusing.....

then the 15 shall be multiplied by two to get 30....ok.

hmm doesnt 15O(2)= 30 O? just wondering...

pkzild · 29-11-2005, 01:55 AM

Yah most likely the O2 molecule will always be in fractions when balanced to 1 mole of carbon.... batman knows what shes doing ok

batman555 · 29-11-2005, 01:59 AM

Quote:

Originally Posted by canza

hmm doesnt 15O(2)= 30 O? just wondering...

In my answer, I got 15/2 as the stoichiometric coefficient for oxygen.

Multiply that by 2 and you get 15.

canza · 29-11-2005, 02:02 AM

yayyyyyy I kinda get it now. Thx batman! and Kazman! and eztool!

Mi-Ko · 06-12-2005, 03:35 AM

need help on chem... tell the truth my teacher doesnt teach that well..

The density of acetylene at STP is 1.17 g/L
a)what is the gram molecular mass of acetylene
b)what is the molecular formula if the empirical formula of acetylene is CH

Mi-Ko · 06-12-2005, 03:52 AM

can someone please help me

Ice(v)an · 07-12-2005, 04:48 AM

am I welcome here again?

to tell you the truth Mi, I sucked at chemistry class but I like doing experiments, but I'm sure if you just input the numbers and look at the reference table you can get the numbers

*Denny Crane* · 07-12-2005, 05:35 AM

^yes you were only banned for a month

~~Luffy~~ · 07-12-2005, 06:53 AM

I need some good Ideas for an Essay..I'm a terrible Writer.

The Topic is a comparison between the Salem witch Trials of the late 1690's and McCarthyism.

28-11-2005, 04:45 AM	#101
batman555 Kazekage Join Date: Jan 2005 Posts: 12,554 My Mood: Rep Power: 666 Total Awards: 8	Re: Homework Help v1.3 Aww...if you were talking about chemistry, there are separate half-life equations for different types of reactions (ie, zeroth order, first order, second order, etc.) __________________ Pretty tennis boys [ Fanfictions: Reborn! + Naruto + more ]

28-11-2005, 04:48 AM	#102
pkzild Special Jounin Join Date: Oct 2004 Location: Canada Posts: 3,308 Rep Power: 34 Total Awards: 1	Re: Homework Help v1.3 its easier if you just use the generic exponential growth/decay formula y(t) = y0*e^kt where t is time y0 = initial amt k = constant works for half/double/everything inbetween life __________________

28-11-2005, 08:22 AM	#103
ShadowNIN Viva Cuba Libre Join Date: Nov 2004 Location: right behind you watching your every move Posts: 2,615 My Mood: Rep Power: 24 Total Awards: 2	Re: Homework Help v1.3 genictis is a hard class but u should try out accounting recievable take so loooooooooooooong to do __________________ Newsletter Issue 14 is OUT Annual Issue And its the BOMB...Check It out Dec 1st...do it ...do it ....do it now...Go to the Newsroom and Enjoy!!! i am watching you from the shadows always ready to strike...If u dont join the (click here)SS Rp. you might not survive much longer!!!

28-11-2005, 05:56 PM	#104
R)X(Z ANBU Join Date: Nov 2004 Posts: 1,675 Rep Power: 20 Total Awards: 1	Re: Homework Help v1.3 hmm After seeing this Logarithm thingy ^^" Can someone give me a hmm site for learning the basic? I found it too be very instresting ^^" although It's problay too early for me, still ^^" (only 14 heh) __________________ Zankaptou: Chyiekaikishi Realse command: I call you here Chyiekaikishi , Knight of the Mind reveal your self If you liked my post, rep me And leave your name I would know who to thank to [=

29-11-2005, 01:33 AM	#105
canza Kazekage Join Date: Nov 2004 Posts: 12,529 My Mood: Rep Power: 86 Total Awards: 1	Re: Homework Help v1.3 Can anyone help me balance this? CH+O(2)=CO(2)+H(2)O And can you show me step by step or like an easier way to do this? There is one, but I forgot. Something about having one side as 1 coefficient and then the other side you solve using multiplication and stuff. __________________ ~Kiss & Cry~

29-11-2005, 01:36 AM	#106
pkzild Special Jounin Join Date: Oct 2004 Location: Canada Posts: 3,308 Rep Power: 34 Total Awards: 1	Re: Homework Help v1.3 yo those things are easy as hell you have to balance H and O last so balance C's first and then H's and O's wait till you do oxidation/reduction or anything harder method of balancing... __________________

29-11-2005, 01:45 AM	#108
canza Kazekage Join Date: Nov 2004 Posts: 12,529 My Mood: Rep Power: 86 Total Awards: 1	Re: Homework Help v1.3 Oh but the answer on the book is different from yours. It says: 2CH+15 O(2)=12CO(2)+6H(2)O __________________ ~Kiss & Cry~

29-11-2005, 01:54 AM	#110
canza Kazekage Join Date: Nov 2004 Posts: 12,529 My Mood: Rep Power: 86 Total Awards: 1	Re: Homework Help v1.3 oooo ok lol from first glance I can tell that it was confusing..... then the 15 shall be multiplied by two to get 30....ok. hmm doesnt 15O(2)= 30 O? just wondering... __________________ ~Kiss & Cry~

29-11-2005, 01:55 AM	#111
pkzild Special Jounin Join Date: Oct 2004 Location: Canada Posts: 3,308 Rep Power: 34 Total Awards: 1	Re: Homework Help v1.3 Yah most likely the O2 molecule will always be in fractions when balanced to 1 mole of carbon.... batman knows what shes doing ok __________________

29-11-2005, 02:02 AM	#113
canza Kazekage Join Date: Nov 2004 Posts: 12,529 My Mood: Rep Power: 86 Total Awards: 1	Re: Homework Help v1.3 yayyyyyy I kinda get it now. Thx batman! and Kazman! and eztool! __________________ ~Kiss & Cry~

06-12-2005, 03:35 AM	#114
Mi-Ko Special Jounin Join Date: Sep 2005 Posts: 3,745 My Mood: Rep Power: 26	Re: Homework Help v1.3 need help on chem... tell the truth my teacher doesnt teach that well.. The density of acetylene at STP is 1.17 g/L a)what is the gram molecular mass of acetylene b)what is the molecular formula if the empirical formula of acetylene is CH __________________ Flickr\| brawl me:5412-9607-7609

06-12-2005, 03:52 AM	#115
Mi-Ko Special Jounin Join Date: Sep 2005 Posts: 3,745 My Mood: Rep Power: 26	Re: Homework Help v1.3 can someone please help me __________________ Flickr\| brawl me:5412-9607-7609

07-12-2005, 04:48 AM	#116
Ice(v)an Akatsuki Join Date: Nov 2004 Location: Urahara Store Posts: 9,394 My Mood: Rep Power: 36 Total Awards: 1	Re: Homework Help v1.3 am I welcome here again? to tell you the truth Mi, I sucked at chemistry class but I like doing experiments, but I'm sure if you just input the numbers and look at the reference table you can get the numbers __________________ thanks to Tom, ~Mrge and Simonarturo, EE

07-12-2005, 06:53 AM	#118
~~Luffy~~ Banned Join Date: Jul 2005 Location: Miami, Florida [305-"Wade" County] Posts: 21,576 Rep Power: 0 Total Awards: 2	Re: Homework Help v1.3 I need some good Ideas for an Essay..I'm a terrible Writer. The Topic is a comparison between the Salem witch Trials of the late 1690's and McCarthyism.