The answer is molar mass to MO2SO4
A spontaneous oxidation-reduction reaction
A pie graph is the graph used to show how a part of something relates to the whole.
Answer: 241. 8g. Add the mass of Fe, 3 N masses (because of the 3 outside the parenthesis), and add the 9 O because of the 3 next to it and the 3 outside. This results to 55.846+42.0201+143.946g that equals 241.8g. I hope this helps