Within a population, variation increases the likelihood that some individuals will be able to survive if the environment changes. Which of the following causes variations within a population? changes in extinction rates
changes in the genetic material
changes in the breeding rate
changes in the environment

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.)

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

What is the molar mass of the anhydrous compound? answer using four significant figures. 36.02 g/mol 120.15 g/mol 156.12 g/mol