To measure the population density of monarch butterflies occ…

To measure the population density of monarch butterflies occupying a particular park, 100 butterflies are captured, marked with a small dot on a wing, and then released. The next day, 150 butterflies are captured, including the recapture of 15 marked butterflies. One would correctly estimate the butterfly population to be

Below is the list of polyatomic ions you may want to use wit…

Below is the list of polyatomic ions you may want to use with the naming questions: Cations: NH4+ = ammonium ion Hg22+ = mercury(I) ion Anions: NO2- = nitrite ion NO3- = nitrate ion SO32- = sulfite ion SO42- = sulfate ion PO43- = phosphate ion MnO4- = permanganate ion CO32- = carbonate ion HCO3- = hydrogen carbonate ion Cr2O72- = dichromate ion CrO42- = chromate ion CN- = cyanide ion OH- = hydroxide ion C2H3O2- = acetate ion ClO4- = perchlorate