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amandax014 Group Title

how many molecules of glucose are in a 2.0 mL of a 1.02 mM solution of glucose

  • one year ago
  • one year ago

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  1. aaronq Group Title
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    find the amount of moles using the formula for molarity: Molarity = moles/Liters of solution then multiply the number of moles by avogadros number

    • one year ago
  2. aaronq Group Title
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    ps. convert to mM to M. 1 mM = 0.001 M

    • one year ago
  3. amandax014 Group Title
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    so calculate the mass C6H12O6? then divide that by 1.02?

    • one year ago
  4. aaronq Group Title
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    no, you don't need the molar mass since you're not converting to grams

    • one year ago
  5. amandax014 Group Title
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    i'm just lost on the moles then how do i find that

    • one year ago
  6. aaronq Group Title
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    with the molarity and the volume of solution given

    • one year ago
  7. aaronq Group Title
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    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

    • one year ago
  8. amandax014 Group Title
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    so like \[\frac{ 2mL }{ 1mm} X \frac{ 1mm }{ 0.001 } ?\]

    • one year ago
  9. aaronq Group Title
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    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 =

    • one year ago
  10. amandax014 Group Title
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    2.04X10^-6

    • one year ago
  11. aaronq Group Title
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    looks right, i don't have a calculator around to check though

    • one year ago
  12. amandax014 Group Title
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    ok thank you so much

    • one year ago
  13. aaronq Group Title
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    no problem

    • one year ago
  14. aaronq Group Title
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    ps you still need to multiply by avogadros number

    • one year ago
  15. amandax014 Group Title
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    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

    • one year ago
  16. aaronq Group Title
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    yep, it's 2.04x10^-4 though don't forget

    • one year ago
  17. amandax014 Group Title
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    why 10^-4 i got -6

    • one year ago
  18. aaronq Group Title
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    sorry -6 lol my mistake

    • one year ago
  19. amandax014 Group Title
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    haha its ok thank you again

    • one year ago
  20. aaronq Group Title
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    lol no prob, good luck

    • one year ago
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