What physical barrier separated groups of snapping shrimp approximately 3 million years ago?

The most efficient way to establish the best possible economizer position is to measure

What are the similarities of physical and chemical change ?

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.