How do two negatively charged particles bahave when held close together and then released

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.

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver