3. Which equation represents positron decay? A) Rb → je+ SIST
B) 92
223 Th + He
C) 23 Al + He → 9P+ on
DC +91e+ HB
I
277U →
I

Answer explain why it is not possible to deduce a complete order of reactivity.

Which three statements represent the benefits of performing experiments using computer simulations?

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