What mass of hydrogen peroxide must decompose to produce 48.64 g of water?
__H2O2 → __O2 +__H2O

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains