d2jsp
Log InRegister
d2jsp Forums > Off-Topic > General Chat > Homework Help > 80 Fg To Who Helps Me With 3 Chemistry Questions
Add Reply New Topic New Poll
Views: 735Replies: 9Track Topic
Member
Posts: 2,258
Joined: May 3 2008
Gold: 17.50
#1
Apr 2 2014 04:13pm
80 fg for 3 correct chemistry questions. Just want this thing done.


This post was edited by daiblorules on Apr 2 2014 04:18pm
Member
Posts: 5,942
Joined: Mar 29 2012
Gold: 7,561.46
#2
Apr 2 2014 06:34pm
197.6 grams i think, but i cant guarantee because i had chemistry years ago :wacko:

edit: nvm, saw it was already done in other topic!

This post was edited by Snyft on Apr 2 2014 06:37pm
Member
Posts: 2,258
Joined: May 3 2008
Gold: 17.50
#3
Apr 2 2014 09:44pm

Whoever answers this starts, And 2 more after will recieve 80 fg.
Thank you.
Member
Posts: 2,258
Joined: May 3 2008
Gold: 17.50
#4
Apr 3 2014 02:38am
Bump
Member
Posts: 5,942
Joined: Mar 29 2012
Gold: 7,561.46
#5
Apr 3 2014 03:55am
i dont really need the fgs cause they are useless to me :wacko: so maybe it would be better to show you how to do this so you dont need anyones help :unsure:

you know that n (number of moles) = m (mass)/ M (molar mass). so you have mass of CsXeF7 and its molar mass is 132.9055 (Cs) + 131.293 (Xe) + 7*18.9984 (7*F) = 397.1873 grams per mole. so number of moles is (73.1)/(397.1873) = 0.184

and since you can see in the equation that one mole of CsF makes also one mole of CsXeF7, then 0.184 moles of CsXeF7 will be made by the same 0.184 moles of CsF. molar mass of CsF is 132.9055 (Cs) + 18.9984 (F) = 151.9039 g/mol so the mass of CsF needed is (151.9039)*(0.184) = 27.95 grams
Member
Posts: 2,258
Joined: May 3 2008
Gold: 17.50
#6
Apr 3 2014 07:27am
Quote (Snyft @ 3 Apr 2014 02:55)
i dont really need the fgs cause they are useless to me :wacko: so maybe it would be better to show you how to do this so you dont need anyones help :unsure:

you know that n (number of moles) = m (mass)/ M (molar mass). so you have mass of CsXeF7 and its molar mass is tel:132.9055 (Cs) + 131.293 (Xe) + 7*18.9984 (7*F) = tel:397.1873 grams per mole. so number of moles is (73.1)/(tel:397.1873) = 0.184

and since you can see in the equation that one mole of CsF makes also one mole of CsXeF7, then 0.184 moles of CsXeF7 will be made by the same 0.184 moles of CsF. molar mass of CsF is tel:132.9055 (Cs) + 18.9984 (F) = tel:151.9039 g/mol so the mass of CsF needed is (tel:151.9039)*(0.184) = 27.95 grams


I'm gonna be honest and say I didn't catch any of that.
Member
Posts: 7,721
Joined: Oct 11 2008
Gold: 304.00
#7
Apr 3 2014 09:57am
Quote (daiblorules @ Apr 3 2014 07:27am)
I'm gonna be honest and say I didn't catch any of that.



moles are like a set amount of something
however, it pertains to elements or chemical compounds
like 12 eggs is 1 dozen and 1.5 dozen is 18 eggs, moles have similar relations

you find that relation by looking it up in the periodic table, the atomic mass
1 mole of w/e element = the atomic mass of that element

This post was edited by saber_x3 on Apr 3 2014 10:03am
Member
Posts: 5,942
Joined: Mar 29 2012
Gold: 7,561.46
#8
Apr 3 2014 12:48pm
Quote (daiblorules @ Apr 3 2014 03:27pm)
I'm gonna be honest and say I didn't catch any of that.


its okay, no one likes that part of chemistry :wacko: people love flashy stuff, colored potions and shit :drool: anyway just post the other two questions if you still need them :mellow:
Member
Posts: 2,258
Joined: May 3 2008
Gold: 17.50
#9
Apr 3 2014 02:11pm
Quote (Snyft @ 3 Apr 2014 11:48)
its okay, no one likes that part of chemistry :wacko: people love flashy stuff, colored potions and shit :drool: anyway just post the other two questions if you still need them :mellow:


what was the answer to the first? and thank youuuu. <3
Member
Posts: 5,942
Joined: Mar 29 2012
Gold: 7,561.46
#10
Apr 3 2014 02:20pm
Quote (daiblorules @ Apr 3 2014 10:11pm)
what was the answer to the first? and thank youuuu. <3


np, i dont have much stuff to do :blush: still you might want a second opinion because im quite careless with basic math operations :wacko: anyway, answer to the first (the one with xenon) is 27.95 grams in my calculation

edit: the thiosulfate was 197.6g

This post was edited by Snyft on Apr 3 2014 02:25pm
Go Back To Homework Help Topic List
Add Reply New Topic New Poll

© 2003-2026 d2jsp  Contact