Mrs. harrison mixes some chemicals together in a glass beaker in front of her science class. she asks her students to watch for a chemical reaction when she holds it over a bunsen burner. she sets the flame on "low" and holds the beaker a few inches above the heat. after about 30 seconds, the mixture begins to fizz. what could mrs. harrison do to make the chemical change occur faster? a) add twice as much of a chemical in the mixture b) increase the flame setting to produce more heat c) use a smaller beaker with the same amount of chemicals d) add cold water to the mixture to reduce its temperature

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

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.

Which statement is true regarding the diagram of circle p? the sum of y and z must be 2x. the sum of y and z must be x. the difference of z and y must be 2x. the difference of z and y must be x