Ablock of magnesium has a mass of 18.7 g and a volume of 3.09 cm3. what is the density of magnesium in g/cm3?

How many atoms are in 1.4 mil of phosphorus trifluoride (pf3)

Iwll give extra points to who gets this for ! what type of reaction is this? ?

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.