How many moles of iron (III) sulfide will be produced if 1.15 moles of sulfur (S) react with excess iron (Fe)? 3.45 mol
0.38 mol
0.77 mol
1.00 mol

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Change in speed or direction : )

The answer to the question is d