Question

Calculate the no. Of moles in the 7.85h of iron

Answer 1

Calculate number of moles in
A)7.85gm Fe (molar mass =56 gm/mol)
B)4.68 mg of Si (molar mass =28.1gm/mol)

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Answer 2

Atomic mass of iron is 56g.
If 56g(Fe) = 1 mole.
then. 7.85(Fe) = x mole.

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