SO2 is removed from the air by means of the following reaction : 2SO 2 + 2CaCO3 + O2 2CaSO4 +2CO2 Determine the mole ratio you would use to convert mol SO2 to mol CaSO4

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction

Hey, could someone me answer this? much appreciated!