Recycling aluminum consumes 95% less energy than refining the ore. Consider a material that requires a total energy of 100 kWh for refining. If recycling requires 95% less energy compared to refining, the same mass of material can be recycled using 5 kWh of energy because 100 kWh – 95 kWh = 5 kWh. The 95 kWh is the energy saved.
About 17 kWh of electricity is required to refine 1.0 kg of aluminum from its ore (17 kWh/kg). How many million kWh of energy is saved if a plant recycles 80 million kg of aluminum?
Express your answer numerically to two significant figures in million kWh. Since the units are million kWh, you may skip multiplying by 106.
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Recycling aluminum consumes 95% less energy than refining the ore. Consider a material that requires a...