Calculate the molality and mole fraction of 5.0g of ethanoic acid in 150 g of benzene​

Correct relationship between molecular formula and empirical formula

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.

Salt in oceans comes from and of rocks