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Renee99

  • 3 years ago

Chemistry question: What is the mass, in grams, of a sample of 6.12 × 1024 atoms of manganese (Mn)? 6.12x10^24 atoms x 1 mol/6.02x10^23 atoms = 10.166 rounded to 10.2 10.2 mol x 54.9380g/1 mol = 558.505 = 559g I was just wondering if I rounded to high to get the right amount of sig figs? Is my answer correct or should I change it?

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  1. Renee99
    • 3 years ago
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    I did it again, but I didn't round and this is what I got: 6.12x10^24 atoms x 1 mol/6.02x10^23 atoms = 10.166 10.166 mol x 54.9380g/1 mol = 558.499g

  2. Susan9419
    • 3 years ago
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    i think your right i just did the problem and came up with the same answer ;D

  3. Renee99
    • 3 years ago
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    the first one or the second one?

  4. Susan9419
    • 3 years ago
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    the second one ;D

  5. Renee99
    • 3 years ago
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    okay, then I'll go with that one! thank you!

  6. Susan9419
    • 3 years ago
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    no problemo ;D

  7. Renee99
    • 3 years ago
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    I will say though, I think I might have written the second one incorrectly. For some reason, I din't feel like it's written correctly...

  8. Renee99
    • 3 years ago
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    don't*

  9. Susan9419
    • 3 years ago
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    it should be written like this i mole= 588.499g so u wrote it right ;D

  10. Renee99
    • 3 years ago
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    doesn't it have to have 3 sig figs though?

  11. Renee99
    • 3 years ago
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    so would I just change it to 558g?

  12. Renee99
    • 3 years ago
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    im just not sure, I just know my teacher is very strict about sig figs

  13. Susan9419
    • 3 years ago
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    yes if u need 3 sig figs then 558 would be correct ;D i was just trying to be accurate sorry!!

  14. Renee99
    • 3 years ago
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    no no, don't be sorry, I like accuracy! lol :) I just wanted to make sure

  15. Renee99
    • 3 years ago
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    Thanks again for ur help!

  16. Susan9419
    • 3 years ago
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    uh-huh no problem ;D

  17. Renee99
    • 3 years ago
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    Okay, yeah so just to clarify, my answer is going to be this: 6.12x10^24 atoms x 1 mol/6.02x10^23 atoms = 10.166 10.166 mol x 54.9380g/1 mol = 558.499 = 558g :)

  18. Susan9419
    • 3 years ago
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    yea thats right ;D

  19. Renee99
    • 3 years ago
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    okie dokie! :D

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