Find the number of grams of zinc (Zn) metal that will completely react with 730 grams of hydrochloric acid (HCl) to produce zinc chloride (ZnCl2) and hydrogen gas
(H2).

Write the balanced chemical equation.
Use coefficients from balanced equation to determine mole ratio.

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.