A 6.00g sample of calcium sulfide is found to contain 3.33g of calcium.What is the percent by mass of sulfur in the compound?

Question

Quizplus · Accepted Answer

We know that the compound contains 6.00g and 3.33g of that is calcium, so the remaining mass must be sulfur. 
Therefore, the mass of sulfur is: 
6.00g - 3.33g = 2.67g

To find the percent by mass of sulfur in the compound, we divide the mass of sulfur by the total mass of the compound and multiply by 100:

(2.67g / 6.00g) x 100 = 44.5%

Therefore, the correct answer is C) 44.5%.

A 600g Sample of Calcium Sulfide Is Found to Contain 3