What is the ph at the half-stoichiometric point for the titration of 0.22 m hno2(aq) with 0.01 m koh(aq)? for hno2, ka = 4.3 × 10−4 ?

Substance x has a fixed volume, and the attraction between its particles is strong .substance y had widely spread out particles and can be compressed what can most likely be concluded about these substances

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?