Chemistry, asked by markaldrin1419, 8 months ago

What mass of Lead is theoretically obtained from 15.0 kg of galena ore that is 72.0% PbS?

Answers

Answered by abhi178
2

We have to find the mass of lead theoretically which is obtained from 15kg of Galena ore that is 72% PbS.

To find : mass of PbS ore = 72% of 15 kg

= 72 × 15/100

= 1080/100 = 10.8 Kg

now mass of lead = mass of PbS × fraction amount of Pb in PbS.

= 10.8 kg × [atomic mass of Pb/molecular mass of PbS ]

atomic mass of Pb = 207.2 u

molecular mass of PbS = 239.3 u

= 10.8 kg × [207.2 u/239.3 u]

= 10.8 × 207.2/239.3

= 9.35 kg

Therefore, theoretically the mass of lead is 9.35 kg in the 15 kg Galena that is 72% of PbS.

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