PLS I NEED HELP WITH THESE QUESTIONS I WILL GIVE BRAINLEST FOR THE ANSWER PLS HELP

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

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.