You begin with a 88.75 gram unknown sample that contains Carbon, Hydrogen and Sulfur. Determine the percentage composition of sulfur if the compound contains 4.4 g of carbon, 775 g of hydrogen, and the remainder is sulfur.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

that tool would be a compass