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using average atomic masses for each of the following elements calculate the mass in any of...

using average atomic masses for each of the following elements calculate the mass in any of 5x10"25 sodium atoms

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Answer #1

number of Na atoms = 5 x 10^25

moles of Na atoms = number of atoms / avagadro number

                              = 5 x 10^25 / 6.023 x 10^23

                             = 83.0

Na molar mass = 23 .0 g / mol

mass of Na = moles x molar mass

                  = 83.0 x 23.0

                  =1909 g

mass of Na atoms = 1909 g

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