PLEASE HELP ME!!
For the reaction
S(s) + O2(g) →→SO2(g) ΔΗ = - 296 kJ
==
a) How much heat is evolved when 275 g sulfur is burned in excess O2?
b) How much heat is evolved when 25 moles sulfur is burned?
c) How much heat is evolved when 150. g sulfur dioxide is produced?