I need these two answers can somebody help me please

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.

8. what happens to matter during a chemical reaction

Calculate the number of grams of sodium in 3.00 g of each sodium-containing food additive.