Question

Calcualte the no of moles in the following massae 7.85 g of fe and 4.86 mg of si

Answer 1

Answer:

(i) 7.85g of Fe

56g of Fe contains 6.022 x 1023 atoms = 1mole

56g of Fe = 1mole

7.85g of Fe = 1/56 x 7.85 = 0.14 moles.

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