Calculate the number of moles in the following masses:(i) 7.85 g of Fe – InterviewSolution

1.

Calculate the number of moles in the following masses:(i) 7.85 g of Fe (ii) 7.9 mg of Ca

Answer»

(i) Number of moles = \(\frac{7.85}{56}\) = 0.1401 mol

(ii) 7.9 mg = 0.0079 g

Number of moles of Ca = \(\frac{0.0079}{40}\)

= 0.000198 mol

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