Small pieces of copper at 100.0°C are placed in 110.0g of water at 25.0°C in a perfectly insulated calorimeter. The water and copper reach the same final temperature. The initial and final temperatures of the water are shown. The heat capacity of water is 4.18J/(g⋅°C). How much heat is transferred during the experiment?

A 220J

B 230J

C 460J

D 920J

920J

D

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.