How do atoms usually combine? in a way that makes each atom less stable. in a way that makes each atom more stable. in a way that increases the number of valence electrons. in a way that decreases the number of valence electrons.

What is avogadro’s number, and why is it useful

What forms when chemical reactions combine pollution with sunlight?

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.