15. Water (H20) is made up of molecules with a bent structure, whereas hydrogen sulfide (H2S) is also made up of molecules with a bent structure. Why is the melting point of H2O much
higher than the melting point of H2S? Select all correct answers.
a. The intermolecular forces in H2S are much greater than those in H20
b. The intermolecular forces in H20 are much greater than those in H2S
c. The three-dimensional arrangement of water makes it a polar molecule
d. Hydrogen sulfide has a lower molar mass than water

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

What is the correct term for living the most sustainable life you can within your current circumstances?

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.