Cuál es el volumen de una muestra que tiene una masa de 20g y una densidad de 4g/ml?

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules