Answered

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Consider again the thermite reaction. If 0. 0257 g Al react completely, what mass of Fe forms? Use the periodic table to find molar masses. Fe2O3 2Al.

Sagot :

Eduard22sly

The mass of Fe obtained from the reaction is 0.0533 g

We'll begin by calculating the mass of Al that reacted and the mass of Fe produced from the balanced equation.

2Al + Fe₂O₃ —> 2Fe + Al₂O₃

Molar mass of Al = 27 g/mol

Mass of Al from the balanced equation = 2 × 27 = 54 g

Molar mass of Fe = 56 g/mol

Mass of Fe from the balanced equation = 2 × 56 = 112 g

From the balanced equation above,

54 g of Al reacted to produce 112 g of Fe.

  • Finally, we shall determine the mass of Fe obtained by the reaction of 0.0257 g of Al

From the balanced equation above,

54 g of Al reacted to produce 112 g of Fe.

Therefore,

0.0257 g of Al will react to produce = (0.0257 × 112) / 54 = 0.0533 g of Fe

Thus, 0.0533 g of Fe was obtained from the reaction.

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