Desolate Carnage
Page 1 of 2 - 1 2
 
@ Evan, Chem Q
Archived | Views: 4836 | Replies: 60 | Started 14 years, 11 months ago
 
#661269 | Fri - Jan 22 2010 - 22:17:47
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
If all they gave me was the volume of a solution, and the mass, and they want to know the density..do I just do D=M/V ?
IE
Volume = 8.11 mL
Mass 14.326 grams

We just went over this in a lecture, but it always included the mass of the cylinder
:donno:
 
#661270 | Fri - Jan 22 2010 - 22:19:33
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Super hi task
 
#661271 | Fri - Jan 22 2010 - 22:20:13
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
super proalbay
 
#661272 | Fri - Jan 22 2010 - 22:20:35
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
fag
 
#661273 | Fri - Jan 22 2010 - 22:21:21
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
is the question about chemistry, or just asking the density of a solution
 
#661274 | Fri - Jan 22 2010 - 22:22:14
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
It's chem, but it's super basic and I wana get a good grade(1st one) so I guess just chem, but really just density.
 
#661275 | Fri - Jan 22 2010 - 22:22:44
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Also ISO Pro tips on converting shit, I hate that.
 
#661276 | Fri - Jan 22 2010 - 22:23:23
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
well yes, the specs of the container have nothing to do with the density of whats inside it, unless its a gas being compressed or something

d = m/v
 
#661278 | Fri - Jan 22 2010 - 22:24:13
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
Quote (7_Deadly_Sins @ Fri - Jan 22 2010 - 22:22:44)
Also ISO Pro tips on converting shit, I hate that.


converting what
 
#661279 | Fri - Jan 22 2010 - 22:25:37
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Quote (randomtask @ Fri - Jan 22 2010 - 22:24:13)
Quote (7_Deadly_Sins @ Fri - Jan 22 2010 - 22:22:44)
Also ISO Pro tips on converting shit, I hate that.


converting what


Anything, I just hate it. Like when you gota convert it to/from 6 different measurements.
 
#661280 | Fri - Jan 22 2010 - 22:25:38
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Quote (randomtask @ Fri - Jan 22 2010 - 22:24:13)
Quote (7_Deadly_Sins @ Fri - Jan 22 2010 - 22:22:44)
Also ISO Pro tips on converting shit, I hate that.


converting what


Anything, I just hate it. Like when you gota convert it to/from 6 different measurements.
 
#661281 | Fri - Jan 22 2010 - 22:26:01
Group: Members
Posts: 50,46540k
Joined: Mar 29 2008
Contact: Offline PM
Points: 9,628.10 $ $
read a fucking book you piece of shit
 
#661282 | Fri - Jan 22 2010 - 22:26:09
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Quote (randomtask @ Fri - Jan 22 2010 - 22:23:23)
well yes, the specs of the container have nothing to do with the density of whats inside it, unless its a gas being compressed or something

d = m/v


super ty.
 
#661286 | Fri - Jan 22 2010 - 22:27:46
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Is the density of 1.00 L of water greater than, less than or squal to the density of 1.00 quart of water? Explain your answer (1 qt = .9464 L).

Short answer is it's equal to, gona look it up to make sure it's right.
I'd think it's equal to b/c it's the same substance, only more or less.

Or

The 1 L is more dense b/c there's more of it.
Donno, brb.
 
#661287 | Fri - Jan 22 2010 - 22:27:49
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
dimensional analysis is good as long as you have a grasp of the change in order of magnitude as you convert
 
#661288 | Fri - Jan 22 2010 - 22:28:47
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Found this:

"The density of pure water is a constant at a particular temperature, and does not depend on the size of the sample. That is, it is an intensive property. The density of water varies with temperature and impurities."

So it's the same
 
#661289 | Fri - Jan 22 2010 - 22:29:25
Group: Members
Posts: 50,46540k
Joined: Mar 29 2008
Contact: Offline PM
Points: 9,628.10 $ $
Quote (xstakemx @ Fri - Jan 22 2010 - 22:26:01)
read a fucking book you piece of shit


 
#661291 | Fri - Jan 22 2010 - 22:30:33
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Quote (7_Deadly_Sins @ Fri - Jan 22 2010 - 22:27:46)
Is the density of 1.00 L of water greater than, less than or squal to the density of 1.00 quart of water? Explain your answer (1 qt = .9464 L).

Short answer is it's equal to, gona look it up to make sure it's right.
I'd think it's equal to b/c it's the same substance, only more or less.

Or

The 1 L is more dense b/c there's more of it.
Donno, brb.


Also note it does not give a temp, so I assume it's the same temp.
 
#661294 | Fri - Jan 22 2010 - 22:32:04
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
ya, density of a substance is the same no matter how much of it you have

unless you are talking compressing amounts of the substance into different sizes of containers, which would leave mass constant but have a different volume, so density would be different
 
#661296 | Fri - Jan 22 2010 - 22:33:01
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Quote (randomtask @ Fri - Jan 22 2010 - 22:32:04)
ya, density of a substance is the same no matter how much of it you have

unless you are talking compressing amounts of the substance into different sizes of containers, which would leave mass constant but have a different volume, so density would be different


Nope, just Chem 1211k intro class.

t4t
 
#661297 | Fri - Jan 22 2010 - 22:34:47
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
Quote (7_Deadly_Sins @ Fri - Jan 22 2010 - 22:33:01)
Quote (randomtask @ Fri - Jan 22 2010 - 22:32:04)
ya, density of a substance is the same no matter how much of it you have

unless you are talking compressing amounts of the substance into different sizes of containers, which would leave mass constant but have a different volume, so density would be different


Nope, just Chem 1211k intro class.

t4t


you will get to gases and shit in intro chem, thats the only chem ive had
 
#661298 | Fri - Jan 22 2010 - 22:36:44
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Quote (randomtask @ Fri - Jan 22 2010 - 22:34:47)
Quote (7_Deadly_Sins @ Fri - Jan 22 2010 - 22:33:01)
Quote (randomtask @ Fri - Jan 22 2010 - 22:32:04)
ya, density of a substance is the same no matter how much of it you have

unless you are talking compressing amounts of the substance into different sizes of containers, which would leave mass constant but have a different volume, so density would be different


Nope, just Chem 1211k intro class.

t4t


you will get to gases and shit in intro chem, thats the only chem ive had


Ya, just ment haven't got into it yet.
 
#661302 | Fri - Jan 22 2010 - 22:39:21
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
i can help you with whatever else in the course probably too, all the real chem nerds here took these classes years ago and either complicate it too much or dont remember the useless intro chem assignments
 
#661306 | Fri - Jan 22 2010 - 22:41:21
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Quote (randomtask @ Fri - Jan 22 2010 - 22:39:21)
i can help you with whatever else in the course probably too, all the real chem nerds here took these classes years ago and either complicate it too much or dont remember the useless intro chem assignments


Super t4t.
I hope I won't need much/any but will take you up on said offer.
 
#662018 | Sat - Jan 23 2010 - 10:38:51
Group: Members
Posts: 13,90610k
Joined: Apr 28 2007
Contact: Offline PM
Points: 3,331.84
for problems like these you can rationalize always by checking the units of the answer and the units of the given quantities. so you know density is in units of g/mL (or g/cm^3) and you know 1 mL = 1 cm^3. since mass is in g and volume is in mL already, you dont even have to convert any units. just divide mass/volume and you have your density
 
#662019 | Sat - Jan 23 2010 - 10:41:06
Group: Members
Posts: 13,90610k
Joined: Apr 28 2007
Contact: Offline PM
Points: 3,331.84
Quote (7_Deadly_Sins @ Fri - Jan 22 2010 - 22:27:46)
Is the density of 1.00 L of water greater than, less than or squal to the density of 1.00 quart of water? Explain your answer (1 qt = .9464 L).

Short answer is it's equal to, gona look it up to make sure it's right.
I'd think it's equal to b/c it's the same substance, only more or less.

Or

The 1 L is more dense b/c there's more of it.
Donno, brb.


water at the same temperature is mostly approximated as the same density no matter what the volume is. density of fluids traditionally dont change, because even though pressure pushing on them may increase, liquids are thought to be incompressible
 
#662300 | Sat - Jan 23 2010 - 17:40:15
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Ty Evan


N help /w

Compound formulas

Ex
What is the formula of the compound formed between the ions SO32- and Na+?

How do I do that?
Feedback from the example

Feedback:
In the formula for a neutral ionic compound, the charges on the ions are understood, but not written.

The formula is written with the symbol of the cation (+ ion) before the symbol of the anion (- ion). The number of each type of ion in the formula, indicated with a subscript, is the minimum required to give a neutral compound. A subscript of 1 is not written, but understood.

If there is more than one of the same polyatomic ion in the formula, the symbol for the ion is enclosed in parentheses to indicate that the following subscript applies to all of the atoms in the ion.

In a neutral compound, the sum of all of the charges must be zero.

The charge on the Na+ ion = +1 and the charge on the SO32- ion = -2
so for a neutral compound the following are combined:

2 Na+ + 1 SO32- Na2SO3

where 2(+1) + 1(-2) = 0

 
#662301 | Sat - Jan 23 2010 - 17:40:23
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Ty Evan


N help /w

Compound formulas

Ex
What is the formula of the compound formed between the ions SO32- and Na+?

How do I do that?
Feedback from the example

Feedback:
In the formula for a neutral ionic compound, the charges on the ions are understood, but not written.

The formula is written with the symbol of the cation (+ ion) before the symbol of the anion (- ion). The number of each type of ion in the formula, indicated with a subscript, is the minimum required to give a neutral compound. A subscript of 1 is not written, but understood.

If there is more than one of the same polyatomic ion in the formula, the symbol for the ion is enclosed in parentheses to indicate that the following subscript applies to all of the atoms in the ion.

In a neutral compound, the sum of all of the charges must be zero.

The charge on the Na+ ion = +1 and the charge on the SO32- ion = -2
so for a neutral compound the following are combined:

2 Na+ + 1 SO32- Na2SO3

where 2(+1) + 1(-2) = 0

 
#662310 | Sat - Jan 23 2010 - 18:35:30
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
nvm I figured it out, just dont understand it
 
#662315 | Sat - Jan 23 2010 - 19:07:31
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
to determine charges on compounds, there are some that are definite that you can look up, and some that you have to tell from what they are a compound with

a few examples of known oxidation numbers
hydrogen is 1
oxygen is -2

so if youve got some best friend compound like

H X O2

where x is some element that you dont know the charge of

H = 1, X = ??, 02 = -4

so, X = 3 for the compound to be neutral

This post has been edited by randomtask on Sat - Jan 23 2010 - 19:07:54
 
#662328 | Sat - Jan 23 2010 - 19:39:06
Group: Members
Posts: 18,44410k
Joined: Jan 19 2008
Contact: Offline PM
Points: 3,262.32 $
Quote (7_Deadly_Sins @ Fri - Jan 22 2010 - 22:27:46)
Is the density of 1.00 L of water greater than, less than or squal to the density of 1.00 quart of water? Explain your answer (1 qt = .9464 L).

Short answer is it's equal to, gona look it up to make sure it's right.
I'd think it's equal to b/c it's the same substance, only more or less.

Or

The 1 L is more dense b/c there's more of it.
Donno, brb.



The density wouldn't change, because water is virtually incompressible for one, and for two they never even say that the pressures aren't equal.
 
#662329 | Sat - Jan 23 2010 - 19:39:40
Group: Members
Posts: 18,44410k
Joined: Jan 19 2008
Contact: Offline PM
Points: 3,262.32 $
Quote (blackjack21 @ Sat - Jan 23 2010 - 10:41:06)
Quote (7_Deadly_Sins @ Fri - Jan 22 2010 - 22:27:46)
Is the density of 1.00 L of water greater than, less than or squal to the density of 1.00 quart of water? Explain your answer (1 qt = .9464 L).

Short answer is it's equal to, gona look it up to make sure it's right.
I'd think it's equal to b/c it's the same substance, only more or less.

Or

The 1 L is more dense b/c there's more of it.
Donno, brb.


water at the same temperature is mostly approximated as the same density no matter what the volume is. density of fluids traditionally dont change, because even though pressure pushing on them may increase, liquids are thought to be incompressible


Yeah, I like this guy's answer. Maybe I won't kill him when I start my new world order.
 
#662401 | Sat - Jan 23 2010 - 22:15:39
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Quote (randomtask @ Sat - Jan 23 2010 - 19:07:31)
to determine charges on compounds, there are some that are definite that you can look up, and some that you have to tell from what they are a compound with

a few examples of known oxidation numbers
hydrogen is 1
oxygen is -2

so if youve got some best friend compound like

H X O2

where x is some element that you dont know the charge of

H = 1, X = ??, 02 = -4

so, X = 3 for the compound to be neutral

t4i

I got 11 OWL things left, yay.

 
#663710 | Sun - Jan 24 2010 - 16:44:17
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
N some help /w Mole/number calculations
 
#663711 | Sun - Jan 24 2010 - 16:46:28
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
EX:
How many ATOMS of sulfur are present in 3.61 moles of sulfur hexafluoride ?

How do you know how many atoms are in Sulfur? Just gota look it up or know it?
 
#663712 | Sun - Jan 24 2010 - 16:48:50
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Wait nvm for the first question
1 atom in the Sulfur
SF6(sub)
 
#663713 | Sun - Jan 24 2010 - 16:58:28
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
nvm figured it out all together
 
#663717 | Sun - Jan 24 2010 - 18:26:40
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
avogadros number

6.022 x 10^23 atoms in one mole, of anything
 
#663720 | Sun - Jan 24 2010 - 18:38:17
Group: Members
Posts: 13,90610k
Joined: Apr 28 2007
Contact: Offline PM
Points: 3,331.84
sry i didnt help a lot m8. try IMing me.
 
#663724 | Sun - Jan 24 2010 - 19:04:51
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
wuts your aim again?
Blackjack21?

I should just rename this topic Johns Chem 101 help
 
#663733 | Sun - Jan 24 2010 - 20:32:56
Group: Members
Posts: 13,90610k
Joined: Apr 28 2007
Contact: Offline PM
Points: 3,331.84
Quote (7_Deadly_Sins @ Sun - Jan 24 2010 - 19:04:51)
wuts your aim again?
Blackjack21?

I should just rename this topic Johns Chem 101 help


evanpl88
 
#663738 | Sun - Jan 24 2010 - 20:38:18
Group: Members
Posts: 7,812
Joined: Feb 24 2008
Contact: Offline PM
Points: 2,703.25
Quote (randomtask @ Fri - Jan 22 2010 - 22:39:21)
i can help you with whatever else in the course probably too, all the real chem nerds here took these classes years ago and either complicate it too much or dont remember the useless intro chem assignments


this
 
#663739 | Sun - Jan 24 2010 - 20:38:40
Group: Members
Posts: 7,812
Joined: Feb 24 2008
Contact: Offline PM
Points: 2,703.25
meant to bold the chem nerds making it to complicated for what you want to do
 
#663750 | Sun - Jan 24 2010 - 21:08:56
Group: Members
Posts: 13,90610k
Joined: Apr 28 2007
Contact: Offline PM
Points: 3,331.84
Quote (BBQ @ Sun - Jan 24 2010 - 20:38:40)
meant to bold the chem nerds making it to complicated for what you want to do


i dont think i over-complicated anything
 
#664743 | Mon - Jan 25 2010 - 20:07:35
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Substance X jas 13 protons, 14 neutrons, 10 electons.

I know it's Al b/c 13 protons is Al..but is it
c Al^3+ or
D Al
wait, they have to have an even # of protons and electrons, so it's C..b/c it's missing 3, and when you add 3 you really take 3 away

This post has been edited by 7_Deadly_Sins on Mon - Jan 25 2010 - 20:09:10
 
#664747 | Mon - Jan 25 2010 - 20:15:23
Group: Members
Posts: 11,50210k
Joined: Apr 21 2007
Contact: Offline PM
Points: 457.90
Task what's your aim?
 
#664748 | Mon - Jan 25 2010 - 20:17:01
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
less electrons = less negatives = more positive = 3+
 
#664749 | Mon - Jan 25 2010 - 20:17:30
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
randomtask2008
 
#664758 | Mon - Jan 25 2010 - 21:14:18
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
gonna poop this pic because i put effort into it and its worth more than an aim convo
 
#664760 | Mon - Jan 25 2010 - 21:14:26
Group: Members
Posts: 74,76940k
Joined: Aug 5 2007
Contact: Offline PM
Points: 7,730.25 $
User Image
Archived | Views: 4836 | Replies: 60 | General Archive - 2010 Topic List
Page 1 of 2 - 1 2
 
Quit the Internet