The Highly Exothermic Thermite Reaction, in Which Aluminum Reduces Iron(III)

question 12

Multiple Choice

The highly exothermic thermite reaction, in which aluminum reduces iron(III) oxide to elemental iron, has been used by railroad repair crews to weld rails together.
2Al(s) + Fe₂O₃(s)  2Fe(s) + Al₂O₃(s) H = -850 kJ
What mass of iron is formed when 725 kJ of heat are released?

• A) 47 g
• B) 65 g
• C) 95 g
• D) 112 g
• E) 130 g

Recognize the adaptations of plants to terrestrial life, including vascular tissue and leaf evolution.

Describe the role of specific plant groups in the history of Earth, such as their contribution to coal deposits.

Understand the impact of structural and reproductive adaptations on plant diversity and evolution.

Identify the structures characteristic of vascular plants and their significance.

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The extra income derived from the utilization of an additional input unit.

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