calculate the amount of heat needed to convert 190 g of liquid water at 18c to steam at 100 c two calculations answer in kilojoules

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

Geothermal energy for industrial use is available almost anywhere. a.true b.false

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.