Final answer:
In a compound containing 15% sulfur, 30g of sulfur corresponds to a total mass of 200g of the compound.
Step-by-step explanation:
If a compound contains 15% sulfur and you have a total of 200g of this compound, to find the mass of sulfur you would multiply the total mass of the compound by the percentage of sulfur present.
To calculate this, convert the percentage to its decimal form (15% is 0.15), and then carry out the multiplication:
Mass of sulfur = (Percentage of sulfur in decimal form) x (Total mass of compound)
Mass of sulfur = 0.15 x 200g = 30g of sulfur.