1.

Galena (an ore) is partially oxidized by passing air through it at high temperature. After some time, the passage of air is stopped, but the heating is continued in a closed furnance such that the contents undergo self-reduction, the weight (in kg)of Pb produced per kg of O_(2) consumend is _______ (Atomic weights in g mol^(=1):O=16,S=32,Pb=207

Answer»


SOLUTION :(6.47)
`PbS+O_(2) to PbSO_(2)`
`(1000)/(32)MOL (1000)/(32) xx207 GM`
mol of Pb= mol of`O_(2)`
`=(10000)/(32)` mol
`:.` MASS of Pb `=(1000)/(32)xx207g`
`=(207)/(32)KG =6.47 `kg


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