What are the very reactive gasses of the periodic table called

What is the value of keq for the reaction expressed in scientific notation?

  the mississippians were considered to be  horticulturalists, which means they were

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.