What is the ion formation for 16^s2-?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

The excretory system,need answers for all: )

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.