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A 1.4639-g sample of limestone was analyzed for Fe, Ca, and Mg. The iron was determined...

A 1.4639-g sample of limestone was analyzed for Fe, Ca, and Mg. The iron was determined as Fe2O3 yielding 0.0385 g. Calcium was isolated as CaSO4 yielding a precipitate of 1.3685 g. Mg was isolated as 0.0733 g of Mg2As2O7. Report the amount of Fe, Ca, and Mg in the limestone sample as %w/w Fe2O3, %w/w CaO, and %w/w MgO.

% Fe2O3
% CaO
% MgO

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Answer #1

% Fe2O3 = 2.6300 %

% CaO = 38.5066 %

% MgO = 1.300 %

mas somple 4631 moss Caomoss Ca so x molar moss ad molarmos Cas0t = 1.318 SA x 56.0774 13 6.1Ag Imo/ masso, Comble 1.4639 mass mao = massing 2 AS 214 mo lar moss MAs 07 Yo ingo 2 1.30D

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