Which is the lowest subgroup? 1.kingdom 2.order 3.genus 4.species

Tell me the iupac names of the following alcohols:

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?

The lewis diagrams for magnesium and fluorine are shown below. what is the correct chemical formula for magnesium fluoride? a. mgf b. mg2f c. mgf2 d. mg2f3