How do you find molality and molarity?

What is the strongest intermolecular force between an nacl unit and an h2o molecule together in a solution? covalent bonding dipole-dipole force hydrogen bonding ion-dipole force

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen