Which best describes when a sonic boom occurs? a. when an object travels below the speed of sound b. when an object travels at or above the speed of sound c. when an object travels at the speed of sound d. when an object travels above the speed of sound

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.