A scientist wanted to determine how temperature effects the solubility of KNO3 in 100 g. of water. Solid KNO3 was added to a beaker filled with 100g of water at 10oC. The beaker was stirred at the same rate until all the solid dissolved. The total amount of KNO3 that was dissolved was 22 g. The scientist repeated the experiment with 100 g. of water at 30oC and 50oC. When the temperature was 30oC, 48 g. of KNO3 was dissolved and when the temperature of the water was 50oC, 84 g. of KNO3 was dissolved. Which of the following is the best conclusion for this experiment?

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

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.