You should get the same amswer

A newly constructed power plant proposes to burn coal with a heating

value of $10,500Bt\frac{u}{l}b.$ What percent sulfur by weight can the coal

contain if the emission standard of $1\mathrm{.}2l\frac{b}{{10}^6}$Btu is to be met without a

$S{O}_2$ control device?

Answer:

$0\mathrm{.}63$ wt$.\%$ sulfur