55: 12
consider the reaction below.
hf + h2o → h30* + f"
which is an acid-conjugate base pair?
hf and h30*
hf and f
h20 and hf
h2o and f

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

you need to have a picture of the atom that way we can answer it