Predict what happens when a base (OH-) is added to a buffer solution containing an equal mixture of a weak acid HA and its conjugate base A-.

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

Can someone me with 3 and 4 plz. this is for masteries test.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.