PLEASE ANSWE

Which of the following statements explains why light is refracted as it moves from air into glass?

A. The energy of light increases in glass.
B. The frequency of light decreases in glass.
C. The speed of light decreases in glass.
D. The wavelength of light increases in glass.

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation: