If an atom has 24 p+ and 24e-, what is the atomic number of this element?

Nan element’s square on the periodic table, the number with the greatest numerical value represents the

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

How many moles are in 7.2 x 10^23 carbon molecules?