The half life of Sodium-24 is 15 hours. If we have 10 grams of Sodium-24, how much will remain after 15 hours?​

heat the gas and measure the pressure

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.