How many moles of \ce{Fe2O3}FeX 2


OX
3


will be produced from 18.0 \text{ g}18.0 g18, point, 0, start text, space, g, end text of \ce{Fe}FeF, e, assuming \ce{O2}OX
2


is available in excess?

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.

Can you guys answer these questions i need it before 1: 00pm

What are two radioactive isotopes that are used for dating rocks that are older than 10 million years