What is the unit of measure when using a beaker

How much heat is released upon converting one mole of steam (18.0 g) from 100.0 ∘c to water at 25.0 ∘c? show work and constants, trying to figure out how it works. only given the heat capacity for steam and water so try to only use that

__can be defined as which velocity changes

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?