George brings you mystery liquid A. You carefully pour it into a graduated cylinder with water (D=1g/ml), mystery liquid B (D=6.1g/ml), and mystery liquid C (D=0.4g/ml) so that they don’t mix. You find that mystery liquid A forms a layer between mystery liquid B and water. Provide a specific density range mystery liquid A could have.

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

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