Fill in the blank Cells are the
and make up.
Cell structures perform basic life functions
for the cell, such as making energy, growing, repairing, and getting rid of waste. Cells
can look different and perform different roles in an organism.

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

What is the molecular weight of copper