An ocean, a forest and a grassy meadow are each examples of a complete ecosystem. Complete ecosystems only contain: a
animals
b
living and nonliving things
c
rocks and water
d
populations of plants and animals

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.