Charlie is using a catalyst to turn rust (iron oxide) back into iron and unstable carbon trioxide. The unbalanced equation is seen below. If he has 1 mole of rust, how many grams of carbon does he need for the reaction to proceed completely? Fe2O? + C ? Fe + CO?

Question

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The balanced equation is Fe2O? + C ? 2Fe + CO?, and only 1 mole of carbon is needed for 1 mole of rust. 1 mole of carbon weighs 12 grams, or answer D.

Charlie Is Using a Catalyst to Turn Rust (Iron Oxide)