how many moles of atoms are in eace of the following?

a. 4.6 x 10^24 Pb atoms

b. 2.87 x 10^22 He atoms

c. 7.91 x 10^23 K atoms

d. 4.41 x 10^21 Ca atoms

3 Answers

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  • 1 decade ago
    Favorite Answer

    In all cases, we must divide by Avogadro's number = 6.022 x 10^23 atoms / mol

    a. 4.6 x 10^24 Pb atoms / 6.022 x 10^23 atoms / mol = 7.63 moles

    b. 2.87 x 10^22 He atoms / 6.022 x 10^23 atoms / mol = 0.0476 moles

    c. 7.91 x 10^23 K atoms / 6.022 x 10^23 atoms / mol = 1.3135 moles

    d. 4.41 x 10^21 Ca atoms / 6.022 x 10^23 atoms / mol = 0.0073 moles

    Good luck!

  • 4 years ago

    1

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  • elga
    Lv 4
    4 years ago

    1024 Pb

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