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A coal source contains 1.1% sulphur by mass. If $2.0 \times 10^{4} k g$ of coal is burned and forms oxides, calculate the mass of $C a S O_{4} (s)$ that is produced from scrubbing the $S O_{2}$ pollutant out of the exhaust gas. Assume that all the sulphur in the coal is converted to $C a S O_{4}$
At wt : Ca = 40, S = 32, O = 16, C = 12

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answer is 935.

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Detailed Solution

The amount of sulphur present is $\frac{2 \times 10^{4} \times 1.1}{100} = 220 k g$
15 gives $1 C a S O_{4}$
That is $32 g$ of 5 gives $136 g o f C a S O_{4}$
$∴ \frac{220 \times 136}{32} = 935 C a S O_{4}$

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