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anonymous

  • one year ago

I have an aluminum cylinder; length =10cm and radius =.25cm density of aluminum =2.70g/cm3 1Al atom =4.48*10-23g How many Al Atoms are in the cylinder? Would you find the volume first? then do mass = d*v? and divide that by the mass of 1 Al atom?

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  1. anonymous
    • one year ago
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    @toxicsugar22 do you know?

  2. anonymous
    • one year ago
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    @3-sfera doing what i explained in the question i got 1.18*10^23 atoms of Al, do you know if i did this correctly

  3. anonymous
    • one year ago
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    let me do some math

  4. anonymous
    • one year ago
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    no my result is 1,2x10^27

  5. anonymous
    • one year ago
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  6. anonymous
    • one year ago
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    i did Vcylinder = pi r^2(h) pi(.25^2)(10) = 1.96cm^3 then mass = d*v m= 2.70*1.96 = 5.292 then 5.292 / 4.48*10^-23 = 1.18*10^23

  7. anonymous
    • one year ago
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    in the question it says taht 1 atom of Al = 4.48 * 10^-23 g

  8. anonymous
    • one year ago
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    my solution is with the molar mass, your volume is incorrect i think. the volume is 1,96*10^3 cm^3

  9. anonymous
    • one year ago
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    so my number of atoms is correct too? 1.18*10^23

  10. anonymous
    • one year ago
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    uhm actually not :).. maybe just some different approximation..maybe the mass on your book is wromg

  11. anonymous
    • one year ago
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    Well by the book, the answer is correct then?

  12. anonymous
    • one year ago
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    @aaronq can you please help?

  13. anonymous
    • one year ago
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    the answer with your atom mass is 1.8*10^26

  14. anonymous
    • one year ago
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    sorry for late i'm a little bit busy

  15. anonymous
    • one year ago
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    i don't understand how you got that.

  16. anonymous
    • one year ago
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    oh flutter wait.. the radius is 0.25

  17. anonymous
    • one year ago
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    *flutter

  18. anonymous
    • one year ago
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    ahha i wanna write f*u*c*k but it shows flutter

  19. anonymous
    • one year ago
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    by the way, i misread the radius

  20. anonymous
    • one year ago
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    your answer is correct i think

  21. anonymous
    • one year ago
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    sorry @Savannah_Lynn13

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