What is the total mass of KCl that must be dissolved in 50 g of H2O at 75°C to make a saturated solution

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

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Why is carbon ideal for making different compounds?