The second movement of one of these pieces by this composer begins with the muted first violins playing the following notes alternately lower and higher:  
The second movement of one of these pieces by this composer begins with the muted first violins playing the following notes alternately lower and higher:  F (pause) C-A (pause) F-C. The E-flat major "Larghetto" second movement of one of these pieces in C minor is in cut common time, and omits the trumpets and timpani. The E-flat major ninth of these pieces begins with the soloist interrupting the orchestra almost right away. The score of the D major penultimate one has huge chunks of the (*) left hand of the solo part missing. A turbulent theme is sandwiched by a serene B-flat major one in the "Romanze" second movement of the twentieth of these pieces, one of only two in a minor key. They includes pieces nicknamed Jeunhomme, Coronation, and Elvira Madigan. For 10 points, name these twenty-seven pieces by Mozart, for a solo keyboard instrument and orchestra. 
The second movement of one of these pieces by this composer begins with the muted first violins playing the following notes alternately lower and higher:  
piano concertos by Wolfgang Amadeus Mozart [prompt on "Mozart concertos"; prompt on "Mozart pieces"; prompt on "piano concertos" until after "Mozart" is read, after which you can accept it] 