09-10-2016
Chemistry

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How many moles are there in 3.92x 10^20 atoms of beryllium

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Willchemistry Willchemistry

23-10-2016

1 mole Be ------------- 6.02x10²³ atoms
?? moles Be ---------- 3.93x10²⁰ atoms

1 x (3.93x10²⁰) / 6.02x10²³ =

=> 0.000652 moles

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