Which data would be most helpful to scientists who measure the risks associated with wildfires? (1 poir Odrought conditions in an area
Ofrequency of severe storms in an area
types of vegetation found in an area
O number of people living in an area

List four observations that indicate that a chemical reaction may be taking place

What is the molar mass of a gas that has density of 2.054 g/l

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