I'm having a bit of trouble on this one problem. It doesn't sound like a combustion problem, because it would normally mix with 02 to make CO2 and H20 but I cant figure out how to write a balanced chemical equation out of it, because it doesnt specify what happens to the sulfer:
When M2S3(s) is heated in air, it is converted to MO2(s). A 4.000 g sample of M2S3(s) shows a decrease of 0.277g when heated in air. What is the atomic mass of M. Report your answer to 1 decimal place.
Any help would be greatly appreciated
p.s. M is an unspecified element