Number of moles in 9g of Fe and 9mg of Ca
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Number of Moles = Given Mass
Molar Mass
(i)so here, Given mass of Fe =9g and Molar mass = 56g
by putting in the formula, we get...
= 9
56
= 0.16 moles
(ii)here , given mass = 9mg = 9×10^-3 g
Molar Mass = 40g
= 9×10^-3
40
= 2×10^-4 moles or 0.0002 moles.
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