The extraction of aluminum metal from the aluminum hydroxide found in bauxite by the hall-héroult process is one of the most remarkable success stories of 19th century chemistry, turning aluminum from a rare and precious metal into the cheap commodity it is today. in the first step, aluminum hydroxide reacts to form alumina and water: in the second step, alumina and carbon react to form aluminum and carbon dioxide: suppose the yield of the first step is and the yield of the second step is . calculate the mass of aluminum hydroxide required to make of aluminum. be sure your answer has a unit symbol, if needed, and is rounded to significant digits.

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1. why does the same side of the moon always face earthc.the rotational period of the moon is equal to one revolution around earth2. which is greater the moons period of rotation or its period of revolution  b.the moons revolution period around earth3.what was the major accomplishment of the apollo missions  c.sending the first human into space4. which of these space missions involved the deployment of lunar roversa. voyager 15. which scientists are going to explore next on kepler-186fd. evidence of existence of life6.which mission is not going to explore the outside of the solar  systemb.safir7.which technology limit the future of space explorationb. scientist must first develop certain technologies before missions can be completed.