If the flask has a volume of 0.25 l , what is the minimum mass of ph3bcl3(s) that must be added to the flask to achieve equilibrium?

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?