so he could study piano with Haydn
during his first visit to Vienna at the age of 17
Not in the sense that Mozart *employed* him, but Beethoven did visit Vienna in 1787, when he was 16 years old, and probably played for Mozart there. Evidence is anecdotal that they actually met, but it would be surprising if they didn't -- it was part of the purpose of the visit, after all.
Mozart died in Vienna, Austria.
The Vienna Phiharmonic was founded in 1842 and Mozart died in 1791. So if you mean 'Were any of Mozart's symphonies played by the Vienna Phil in his lifetime?' the answer is no. If you mean 'Have any of Mozart's symphonies been played by the Vienna Phil?' the answer is yes, many of them, many times.
Mozart died in his 30s in Vienna
Vienna
Vienna
He moved to Vienna.
In vienna.
Vienna is located in Austria; and Wolfgang Amadeus Mozart died there.
1778 Beethoven traveld to Vienna to study with Mozart.
Wolfgang Amadeus Mozart died on the 5th of December 1791 in Vienna.