Plsss help which law is that

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable

Citric acid has a ph between 1 and 3.  it is considered to be aa. weak acidb. weak basec. strong based. strong acid

Determine the ph of 0.10 m nh3 solution. nh3 is a weak base with a kb equal to 1.8 x 10-5 round answer to nearest whole number.