The normal boiling point of bromine, br2(l), is 58.8°c, and its molar enthalpy of vaporization is δhvap = 29.6 kj/mol. (a) when br2(l) boils at its normal boiling point, does its entropy increase or decrease? decrease (δs is negative) increase (δs is positive) (b) calculate the value of δs when 1.00 mol of br2(l) is vaporized at 58.8°c.

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.

What if it is did darwin used to support his theory of evolution

In an experiment, 45g of silicon tetrachloride are treated with 45ml of water. what is the theoretical yield in grams of hcl