Using the chemical equation below, how many grams of Fe produce when 7 moles of Fe2O3 are reacted ? 2Al+Fe2O3 —> Al2O3+2Fe

784 g.

Explanation:

Since 1 mole of gives us 2 moles of $Fe$, 7 moles $Fe_2O_3$ will give us 14 moles of $Fe$

Molar mass of $Fe$= 56 g/mol

Thus, mass of 14 moles is $14 \times 56= \boxed{784}$

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