Answers revealed in the comments.
GAME 1
The collar, valve, intake, and air holes are among the parts of what piece of equipment, whose improved design in the mid-1800s was developed by a German chemist?
GAME 2
In February 2019, what group reached #1 on the Billboard 200 albums chart for the third time overall, but the first time in more than 18 years?
hebspeaks 
Final 1 answer: bunsen burner
final 2 answer: backstreet boys