helppppppppppppppppppppp?

1. For a given liquid, the enthalpy of vaporization is 31.81 KJ/mol and the boiling point at 1 atm is 97.14C. what is the vapour pressure of the liquid at 32C?

2. For a given liquid, the enthalpy of vaporization is 32.6 KJ/mol and the vapour pressure is 107 torr at 25C. what is the boiling point of the liquid at 1 atm?

3. Identical hard spheres of radius R are packed together to form a simple cubic lattie. What is the ratio a/R, where a is the edge length of the unit cell?

4.An unidentified metal crystallizes in a body-centered cubic lattice with an edge length of 287 pm. The density of the metal is found to be 7.85 g/cm^3. What is the identity of the metal?

please explain in steps.