A 2.00 mL sample of a substance A has a density of 18.4 g/mL and a 5.00 mL sample of substance B has a density of 35.5 g/mL. Do you have an equal mass of substances A and
B? Explain your answer.

What is the formula that this ionic compounds could form sr2+p3-o2-

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

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.