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Number 4 is wrong I don’t know how to solve it!
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Number 4 is wrong I don’t know how to solve it!

Number 4 is wrong I don’t know how to solve it!-example-1
User Alexey Andrushkevich
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The answer is (2). Because a mole equals 6.02 x 10^23 atoms. But since it is approximate; "6.0 x 10^23"
User Pavel Belousov
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