Lead(II) oxide is obtained by roasting galena, lead(II) sulfide, in air.

Chemistry
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Lead(II) oxide is obtained by roasting galena, lead(II) sulfide, in air.
PbS(s) + O2(g)  PbO(s) + SO2(g)
(a) Balance the equation. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.)

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2PbS(s) + 3O2(g)  →  2PbO(s) + 2SO2(g)

Determine the theoretical yield of PbO if 224.5 g PbS is heated.
 g

(b) What is the percent yield if 160.0 g PbO is obtained?
 

 %

Jun 2nd, 2015

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Jun 2nd, 2015

i can balance the equation but am finding hard to find theoretical yield and percent yield

Jun 2nd, 2015

Moles PbS = 224g / 239.254 g/mol =0.93624
= moles PbO
Mass PbO = 0.93624 x 223.19 = 208.9602
% yield = 165 x 100 / 208.9602 = 78.9624

Jun 2nd, 2015

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