Answer:
<u>49.54 g</u>
Explanation:
Let's take the masses of both calcium sulfate and sulfur dioxide formed.
Sulfur dioxide = 32 + 2(16) = <u>64 g</u>
Calcium sulfate = 40 + 32 + 4(16) = <u>136 g</u>
So, under ideal conditions, to produce 136 g of Calcium sulfate, we require 64 g of Sulfur dioxide.
But, it mentions the process is only 95% efficient.
Hence, taking the ratio :





x = <u>49.54 g</u> (approximately)