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happykiddo

  • 2 years ago

How do I figure out the number of atoms in element, when I know the molar mass is 3.30 ???

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  1. sara12345
    • 2 years ago
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    whats the element ?

  2. happykiddo
    • 2 years ago
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    Krypton

  3. sara12345
    • 2 years ago
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    so you have 3.3 moles of Krypton, and you want to find how many atoms are there, is tha t right ?

  4. happykiddo
    • 2 years ago
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    Yes

  5. sara12345
    • 2 years ago
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    replace mole wid Avogadro number

  6. happykiddo
    • 2 years ago
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    Ok

  7. sara12345
    • 2 years ago
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    1 mole = 6.022 × 10^23 items

  8. sara12345
    • 2 years ago
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    just like, 1 dozen = 12 items

  9. sara12345
    • 2 years ago
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    3.3 moles of Kr = 3.3 x 6.022 × 1023 atoms

  10. happykiddo
    • 2 years ago
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    Thanks, a bunch. :)

  11. happykiddo
    • 2 years ago
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    We're did you get1023

  12. happykiddo
    • 2 years ago
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    Please answer me , I need some clarification .

  13. sara12345
    • 2 years ago
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    3.3 moles of Kr = \(3.3 \times 6.022 × 10^{23}\) atoms

  14. sara12345
    • 2 years ago
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    its like that

  15. sara12345
    • 2 years ago
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    \(1\ mole = 6.022 \times 10^{23} \) atoms

  16. happykiddo
    • 2 years ago
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    Oh oops ok thank you very much. :)

  17. sara12345
    • 2 years ago
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    wlc :)

  18. happykiddo
    • 2 years ago
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    So the answer is 19x10 to 23 atom According to significant figures

  19. sara12345
    • 2 years ago
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    you wanto show it in scientific notation ?

  20. happykiddo
    • 2 years ago
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    So the answer is 19 x 10 to 23 power According to significant figures

  21. sara12345
    • 2 years ago
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    \(3.3 \times 6.022 × 10^{23}\) \(19.8726 \times 6.022 × 10^{23}\) \(1.98726 \times 6.022 × 10^{24}\)

  22. sara12345
    • 2 years ago
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    thats scientific notation, we must change that 19.xxxx to 1.9xxxx

  23. happykiddo
    • 2 years ago
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    Oh yeah forget .....well really once again thank you.

  24. sara12345
    • 2 years ago
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    yw

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