In bohr's atomic theory when electron moves from one energy level to another energy level closer to the nucleus:
a. energy is emitted
b. energy is absorbed
c. no change in energy occurs
d. light is emitted
e. more than one of these might occur

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.