Help please, it’s about chemical bonding. :))

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.

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse