Asked by dennis

15. Liquid elemental iron is produced in the thermite reaction because enough heat is generated to melt the iron:
2 Al(s) + Fe2O3(s)----> Al2O3(s) + 2 Fe(l)

What mass of aluminum is needed to produce 750 grams of iron?

Answered by Dennis
Liquid elemental iron is produced in the thermite reaction because enough heat is generated to melt the iron:
2 Al(s) + Fe2O3(s)----> Al2O3(s) + 2 Fe(l)

What mass of aluminum is needed to produce 750 grams of iron?
Answered by bonjo
2 moles of Al produces 2 moles of Fe. and 750grams of Al is 750g/26gmol-1 = 28.85moles. 2Al is 2x28.85moles = 57.7moles which is equal to the mole of Fe.

with this mole, use the formula m = nMr to find the mass, where n is the mole and Mr is the molar mass of iron.
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