Mt. McKinley in Alaska has an altitude of 20,320 ft. Water (AH/ap 40.7 kJ/mol) boils in 77°C atop Mt. McKinley. What is the normal atmospheric pressure at the summit?

What is a property of a double replacement reaction

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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.