One sound is loud and another is quieter. what must be different about these two sound waves?

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.