25. Se doreşte obţinerea unei soluţii acide prin dizolvarea în apă a unui aminoacid. Care va fi aminoacidul cel mai potrivit în acest scop?
A. acidul aminoacetic
B. acidul 2-aminopropionic
C. acidul 2-aminopentandioic
D. acidul 2,6-diaminohexanoic
E. acidul 2-amino-3-hidroxipropanoic

Nonpoint source pollution is difficult to control because it

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

How does carbon monoxide pose the greatest threat to humans? a. it can be produced by wood fires. b. it can be produced by home furnaces. c. it is produced by acid rain. d. it is produced by modern automobiles.