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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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Cupcake16 Cupcake16
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10 years ago
How many glucose (C6H12O6 )molecules are in a bottle of glucose with a volume of 575 mL? The density of pure glucose is 1.54 g/mL.
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10 years ago
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Cupcake16 AuthorCupcake16
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10 years ago
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#3
Donated
10 years ago
Mark as solved!
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#4
10 years ago
Thank you Mikael, this is very helpful.
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#5
9 years ago
Thank you!
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#6
9 years ago
m = d * V
m = 1.54*575 = 885.5 g

Avogadro constant (symbols: L, NA) is defined as the number of constituent particles (usually
atoms or molecules) in one mole of a given substance. It has dimensions of reciprocal
mol and its value is equal to 6.022*1023 mol−1.

n = m/Mw, where Mw is molecular weight, for glucose it is 180.
n = 885.5 / 180 =4,92 mol
So, N = NA * n (N is number of molecules)
N = 6.022*1023 * 4.92 = 2.962*1024 molecules
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#7
9 years ago
very nice
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#8
9 years ago
Thank you!
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#9
9 years ago
thank you
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#10
9 years ago
Wow, I'm still so confused about these moles and whatnot....I guess I just wasn't cut out for Chemistry!
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#11
9 years ago
Thanks for the help
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