Formula unit represents the simplest ratio of elements in a of an ionic compound.
a crystal is made up of
there are two magnesium ions for every two sulfide ions in magnesium sulfide. the ratio of mg to s in the formula unit is .

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump

Consider this initial-rate data at a certain temperature for the reaction described by