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22 June, 21:45

A single atom of platinum has a mass of 3.25x10^-22g. What is the mass of 6.0x10^23 platinum atoms?

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  1. 22 June, 23:23
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    194.36 g

    Solution:

    Data Given:

    Number of Atoms = 6.0 * 10²³

    A. Mass of Platinum = 195.08 g. mol⁻¹

    Step 1: Calculate Moles of Platinum,

    Moles = Number of Atoms : 6.022 * 10²³ Atoms. mol⁻¹

    Putting value,

    Moles = 6.0 * 10²³ Atoms : 6.022 * 10²³ Atoms. mol⁻¹

    Moles = 0.9963 mol

    Step 2: Calculate Mass of Platinum:

    Moles = Mass : M. Mass

    Solving for Mass,

    Mass = Moles * M. Mass

    Putting values,

    Mass = 0.9963 mol * 195.08 g. mol⁻¹

    Mass = 194.36 g
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