Fortress of Wonders
Hey there, welcome to the forum! Feel free to login!
Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Can I Use Gameshark On A PSX Emulator?
Fri May 10, 2013 7:28 pm by Link ATK

» Kingdom Hearts 358/2 Days - Action Replay (U) Codes
Thu Mar 14, 2013 9:02 am by UnderNetKing

» [NDS] The Legend of Zelda: Phantom Hourglass (U) - Action Replay Codes
Sun Nov 11, 2012 11:37 pm by Amy

» Honors English 3 - My Answers
Sat Aug 25, 2012 7:25 pm by Link ATK

» [N64] - Ocarina of Time Highly Coveted Codes
Thu Jul 12, 2012 4:31 pm by Link ATK

» Courtney putting her leg behind her head xD
Tue Jun 12, 2012 11:26 pm by Link ATK

» Guild Wars 2 - The BWE
Fri Jun 08, 2012 11:38 am by Link ATK

» Nintendo DS - Discussion Thread
Wed Jun 06, 2012 11:24 am by Link ATK

» Honors Physics Summer Assignment - How To + Answers
Wed Jun 06, 2012 9:30 am by Link ATK

November 2017
MonTueWedThuFriSatSun
  12345
6789101112
13141516171819
20212223242526
27282930   

Calendar Calendar

Top posting users this week

Top posting users this month


Chemistry HW [12/7/11] - Mole Potpourri

View previous topic View next topic Go down

Chemistry HW [12/7/11] - Mole Potpourri

Post by Link ATK on Wed Dec 07, 2011 9:04 pm

Okie dokie. So, I'll do the Water table and from there you can do the rest. Row by row.

Formula or Symbol
H2O
Name of Represen
tative particles
Molecules
Total number of
representative Particles
in one mole
6.02x1023
Mass of one mole
18.015g
GIVEN AMOUNT
130mL
Moles of given amount
7.22
Number of representative
particles in given amount
4.35x1024 representative
particles
Mass of Given Amount
130g



Formula Symbol: Okay, so we're dealing with Water. Everyone knows that's H2O, if you don't then no worries; look it up on Google or something.

Name of Representative Particles: this was already filled in.

Total Number of Rep. Particles in one Mole: Okay, this is in one mole regardless. Remember Androgov's number, 6.02x1023? Well, that's the answer.

Mass of one mole: To figure this out, you get the molar mass of the formula in question. We know water's formula is H2O so you get the mass of two hydrogens and one oxygen like so:

H2: 1.008x2 = 2.016g
O: 15.999
2.016 + 15.999 = 18.015g, as given in the table.

GIVEN AMOUNT: already filled in.

Moles of given amount: This is where it gets tricky. Scroll down to point number 8, where you will find that the mass of the given amount is 130. To find the amount of moles in this given amount, divide the Mass of given amount (130g) by the mass of one mole of water (18.015), which will result in approximately 7.22 moles.

Number of Representative particles in given amount: This is definitely where it gets tricky. Hearken back to the 12/6/11 HW [find it here] and recall that the Particles / Androgav's # = the amount of moles, and the moles times the formula mass = the mass of the sample. Well, we're trying to get the number of particles in the given amount, so we're gonna work backwards.

Sample Equation for easier viewing:

P/A
= Mol
Mol x mbase formula = msample amount

For msample amount we can fill in as 130. For mbase formula we can fill in with 18.015. For Mol, we can fill in with 7.22. Oh, wait silly me, we've already done that! We have the moles.

So for Mol we can fill in as 7.22. For A, recall that it is androgov's or whatever his name is # which is 6.02x1023. Working backwards, multiply 7.22 by Andy's # and you'll get something similar to 4.35x1024.

Mass of given amount: This is where it gets tricky. Get the density formula, D = m/v. We know water's density is 1, and the volume (given) is 130mL. Multiple 1 by 130 to get 130g, which is in fact the mass of the given amount.

_________________
avatar
Link ATK
Admin
Admin

Reputation : 7
Location : Tejas

Character Profile
Profession: Tutorial Writer Tutorial Writer

View user profile http://fortofwonders.forumotion.com

Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum