Which compound is a conjugate acid-base pair?
h2po4– and hpo42–
h3po4 and hpo42–
h2po4– and po43–
h3po4 and po43–

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.

What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.