Translate the word equation to formulaic equation and then balance it. Solid'iron'III'oxide'and'carbon'mon oxide'gas'produce'iron'metal'and'ca rbon'dioxide'gas.

Explanation:

   Reactants

Solid 'iron'III'oxide'  = Fe₂O₃

'carbon'monoxide'gas' = CO

Product

'iron'metal' = Fe

carbon'dioxide'gas  = CO₂

 Now

            Fe₂O₃  + 3CO  →   2Fe + 3CO₂

The reactants are positioned at the left hand side of the equation.

The products are at the right hand side

s = solids

g = gases

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genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).