which option is correct
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You need to make use of Avagadro Number to determine how many atoms of zinc are there in one mole of zinc.
Then, you have to divide the atomic mass of zinc to determine how many atoms are available in 1 gram.
One mole of zinc has 65.4 g. 1 gram of zinc= 6.022x10^23/65.37 = 9.21x10^21 atoms.
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