Use Hess's law and the following equations to calculate triangle H for the reaction SO2 (g) + NO2 (g) arrow SO3 (g) + NO (g). SO3(g) arrow SO2(g) + 1/2O2(g) traingleH=-98.4kJ/mol
1/2N2(g) + 1/2O2(g) arrow NO(g) triangleH=90.3 kJ/mol
NO2(g) arrow 1/2N2(g) + O2 (g) triangleH=-33.1 kJ/mol

Plz mark brainliest 30 points1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s.2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?