Sodium carbonate decahydrate crystals were left exposed on a watch glass for two days state the observation on the crystals after two days

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 someone me with these questions plz.

What is the mass of 8 moles of sodium atoms