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Mole concept

(a) How many moles are there in 1.95 x 10^24 atoms of copper?
(b) How many moles are there in 85.7g of H2SO4?

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(a) How many moles are there in 1.95 x 10^24 atoms of copper?
One mole of any substance has 6.02*10^23 atoms
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