anonymous
  • anonymous
how many molecules of glucose are in a 2.0 mL of a 1.02 mM solution of glucose
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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aaronq
  • aaronq
find the amount of moles using the formula for molarity: Molarity = moles/Liters of solution then multiply the number of moles by avogadros number
aaronq
  • aaronq
ps. convert to mM to M. 1 mM = 0.001 M
anonymous
  • anonymous
so calculate the mass C6H12O6? then divide that by 1.02?

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aaronq
  • aaronq
no, you don't need the molar mass since you're not converting to grams
anonymous
  • anonymous
i'm just lost on the moles then how do i find that
aaronq
  • aaronq
with the molarity and the volume of solution given
aaronq
  • aaronq
molarity is a form of expressing concentration (in terms of moles per liter).. so basically by multiplying the molarity by the volume, you find the moles but you have to covert to molarity because mM meaning millimolar, 1 molar = 0.001 millimolar
anonymous
  • anonymous
so like \[\frac{ 2mL }{ 1mm} X \frac{ 1mm }{ 0.001 } ?\]
aaronq
  • aaronq
nope convert volume to liters .. 2mL = 0.002 L convert millimolarity to molarity 1.02 mM = 0.00102 M 0.00102 M x 0.002 L =
anonymous
  • anonymous
2.04X10^-6
aaronq
  • aaronq
looks right, i don't have a calculator around to check though
anonymous
  • anonymous
ok thank you so much
aaronq
  • aaronq
no problem
aaronq
  • aaronq
ps you still need to multiply by avogadros number
anonymous
  • anonymous
yea i figured that I'm trying to get a better number I would take that equations answer 2.04 ... and multiply it by avogadro's number right
aaronq
  • aaronq
yep, it's 2.04x10^-4 though don't forget
anonymous
  • anonymous
why 10^-4 i got -6
aaronq
  • aaronq
sorry -6 lol my mistake
anonymous
  • anonymous
haha its ok thank you again
aaronq
  • aaronq
lol no prob, good luck

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