× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
Jessc Jessc
wrote...
Posts: 50
Rep: 1 0
7 years ago
Here's the formula I am given......

Fraction 1: weight: X
        GC ratio: A hex : A hep
Fraction 2: weight Y
        GC ratio: B hex : B hep
Fraction 3: weight: Z
        GC ratio: C hex : C hep

Ahex = area hexane/ area hexane + area heptane
Ahep = area heptane/area hexane + area heptane

Solve for weight of hexane:
 Mass hexane = A hex * X + B hex * Y + C hex * Z
 Mass heptane = A hep * X + B hex * Y + C hex * Z

Solve for % hexane and % heptane:
%hexane = mass hexane / mass hexane + mass heptane
% heptane = mass heptane / mass hexane + mass heptane


My weights are, Fraction 1 is 4.47g, Fraction 2 is 4.7g, and Fraction 3 is 4.24g  and I have no idea how to set this problem up even with the formulas given  Crying Face
Also I am not sure what GC ratio means but I have percent composition estimated from a graph and found that to be 52% hexane and 48% heptane, if that is GC ratio or not I don't  know
 Attached file(s) 
Thumbnail(s):
You must login or register to gain access to these attachments.
Read 236 times
2 Replies

Related Topics

Replies
wrote...
Valued Member
Educator
6 years ago
Did you ever end up answered any of these?

Could you update the community with the answers?
Jessc Author
wrote...
6 years ago
I was missing information so unable to solve this problem.
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  947 People Browsing
Related Images
  
 305
  
 175
  
 156
Your Opinion