Which car has the most momentum? A. a 1,820 kg car traveling east at 30 m/s
B. A 2,270 kg car that is stationary
C. A 1.460 kg car that is traveling south at 80 m/s
D. a 730 kg car that is traveling north at 90 m/s

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.