All the elements in the same period have the same A. Valence electrons
B. Energy shells or orbitals
C. Atomic mass
D. Atomic number

Non renewable resources like petroleum eventually

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume

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