Consider these equations: 2S (s) + 3O2 (g)→2SO3 (g) , ΔH = −792 kJ 2S (s) + 2O2 (g)→2SO2 (g) , ΔH = −594 kJ 2SO2 (g) + O2 (g)→2SO3 (g) , ΔH =?
What is the missing ΔH ?
−294 kJ
−198 kJ
+198 kJ
+294 kJ

Avolleyball player hit a ball with a mass of 0.25 kg. the average acceleration of the ball is 15.5 m/s². how much force did the volleyball player apply to the ball? 62.0 n 3.87 n 62.0 m/s² 3.87 m/s²

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?

Acompound has the molecular formula c3h8. which class of organic compounds does it belong to?