What does the area between points D and E represent for the substance on the heating curve below? A freezing point
B melting point
C boiling point
D sublimation point

What layer of the atmosphere is directly above the troposphere?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.