Copper is now extracted from ores containing a low percentage of copper compounds suggest two reasons why?

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Rank substituents in order of their priority when assigning the e or z label to an alkene. i, ch2i , h, ch2ch2cl, f