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Chemistry / Chemistry: A Molecular Approach 3 / Chapter 1 / Problem 128E

Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro

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Lead metal can be extracted from a mineral called galena,

Chapter 1, Problem 128E

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QUESTION:

Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. A particular ore contains 68.5% galena by mass. If the lead can be extracted with 92.5% efficiency, what mass of ore is required to make a lead sphere with a 5.00 cm radius?

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QUESTION:

Lead metal can be extracted from a mineral called galena, which contains 86.6% lead by mass. A particular ore contains 68.5% galena by mass. If the lead can be extracted with 92.5% efficiency, what mass of ore is required to make a lead sphere with a 5.00 cm radius?

ANSWER:

Problem 128ELead metal can be extracted from a mineral called galena, which contains 86.6% lead bymass. A particular ore contains 68.5% galena by mass. If the lead can be extracted with92.5% efficiency, what mass of ore is required to make a lead sphere with a 5.00 cmradiusAnswerStep 1 of 4From the given,Radius of lead sphere = 5.00 cm 3Density = 11.34 g/cmLet’s calculate the volume of the lead sphere by using radius.Volume of lead sphere can be calculated by the following formula. V olume = 4r3 43 3 3 × 3.14 × (5.00) = 523 cm 3

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