<P> Sonata for Piano and Violin No. 21 in E minor, K. 304 (K300c) is a work by Wolfgang Amadeus Mozart . It was composed in 1778 while Mozart was in Paris . The piece was composed during the same period that Mozart's mother, Anna Maria Mozart, died, and the sonata's mood reflects this . It is the only instrumental work by Mozart whose home key is E minor . </P> <Ol> <Li> Allegro (in E minor) </Li> <Li> Tempo di Menuetto (in E minor) </Li> </Ol>

Sonata for piano and violin in e minor k. 304