Complete the flow chart with the steps necessary for preparing the buffer solutions.
Inbeakers, obtainof the 0.1 M weak acid andof the conjugate base stock solutions. This will be your supply to make the buffer solutions. Prepareof the assigned 1:1 buffer solution in a clean, labeled 100 mL. You will need to useof the 0.1 M weak acid andof the 0.1 M conjugate base. Measure out the stock solutions using a clean, being sure to rinse it into the waste beaker between each solution to prevent contamination.
Write out how much weak acid and conjugate base will be used to make each of the remaining buffer solutions:
a. 1:4.
b. 1:9.
c. 4:1.
d. 9:1.

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.

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium