Which of the following is the correct set up AND answer to convert 6.25 x 1032 atoms of Copper to grams of Copper?

Question

Which of the following is the correct set up AND answer to convert 6.25 x
1032 atoms of Copper to grams of Copper?

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niczorrrr 4 years 2021-07-29T13:44:03+00:00 1 Answers 16 views 0

Answers ( )

  1. thaiduong
    0
    2021-07-29T13:45:35+00:00
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    Answer:

    Explanation:

    How many mols do you have?

    1 mol = 6.02 * 10^23 atoms

    x mol = 6.25 * 10 ^32 atoms

    1/x = 6.02*10^23 / 6.25 * 10^32        Cross multiply

    6.02 * 10^23 * x = 1 * 6.25 * 10^32    Divide by 6.02 * 10^23

    x = 6.25 * 10*32/ 6.02 ^10^23

    x = 1.038 * 10^9 mols which is quite large.

    Find the number of grams. (Use the value for copper on your periodic table. I will just use an approximate number.)\

    1 mol of copper = 63 grams.

    1.038 * 10^9 mols of copper = x

    1/1.038 * 10^9 = 63/x         Cross multiply

    x = 1.038 * 10^9 * 63

    x = 6.54 * 10^10 grams of copper.

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