Draw Lewis dot structures and determine the shapes for each of the polyatomic ions listed below. HCO3-

PO43-

PCl2-

OCN-

SCN-

NO3-

TeF5-

Asmall amount of a solid is added to water. the observation made after fifteen minutes is shown in the figure. which of these solids has been probably added to water? a) oil b) sand c) sugar d) wood chips

What does the process of natural selection involve

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?