How many atoms are there in 0.25 moles of magnesium, Mg #12

One or more substances changing into one or more substances is an example of a

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?