Billie Eillish or Aryan grande

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Calculate the expected ph values of the buffer systems from the experiments (a, b,c, d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

Can someone me with 6 to 10 plz this is for masteries test.