Which one is a true statement about endothermic reactions?

a. energy from an outside source is continuously being added.
b. more heat is given off than is put into the reaction.
c. the reactants have less heat energy than the last products.
d. the reaction container always feels hot.

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

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Match each statement with the state of matter it describes