Which is more concentrated: a 1.0 L solution with 20g of sucrose, C12 H22 O11, or a 1.0 L solution with 20 g of glucose, C6 H12 O6? Explain.

Question

e.cociuba · Answer

@electrokid

anonymous · Answer

did you calculate the molarities?

anonymous · Answer

see.. isnt hard to tag people .. :P

e.cociuba · Answer

Haha ya but when they ignore u, it is.. lol

anonymous · Answer

yep. math is easy.. everybody just plays with numbers.. when it comes to applications, thats when people ___ in pants

anonymous · Answer

ok, so what about the molarities here?

anonymous · Answer

molar mass of sucrose = $12(12)+22(1)+11(16)=?$
molar mass of glucose = $6(12)+12(1)+O(6)=?$

e.cociuba · Answer

Ok so when u mean molarity, do u mean this: 
    (12)(12.01) 
+ (22)(1.008) 
    (11)(16.00) 
     ---------

anonymous · Answer

yep-> thats molar mass

e.cociuba · Answer

Ok so I got 342.298...

anonymous · Answer

good
so, 342.3g of sucrose = 1mole
therefore, 20g of sucrose = ? moles?

anonymous · Answer

20g of sucrose = $\Large{20\over342.298}=?$

e.cociuba · Answer

Isn't 1 mole supposed to be on top?

e.cociuba · Answer

Oh wait nvm oops Now I see..

anonymous · Answer

by proportionality,
if 342.298 g = 1mole,
then 30g would be less than 1mole

anonymous · Answer

so, how many moles of sucrose would that be?

e.cociuba · Answer

Ok now tht just confused me... srry..

anonymous · Answer

dont worry.
you understand that you'd have to divide, right?

e.cociuba · Answer

yup

e.cociuba · Answer

|dw:1366141870311:dw| I thought this is how u do it, cuz the grams have to cancel out??