mercury metal is poured into a graduated cylinder that holds exactly 22 ml the mercury used to fill the cylinder weighs 308 g from this information calculate the density of mercury

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

Which of these activities increases the amount of carbon in the atmosphere?

Explain the difference in reactivity of the elements based on their electron configurations.