The substance is pure depending on which atoms bond.
M+90=150
minus 90 in both sides
m=60
A BIOME is a major ecosystem spread over a wide geographic area, and characterized by certain types of flora and fauna, as determined by climate. Climate and soil determine the flora, which, in turn, largely determine what type of other organisms live in that biome.
Biomes
Excuse me sorry but it does not show your question. do you think you could post your question again?
