HELP A MENTALLY DRAINED CHEM STUDENT PLEASEEE A cylinder contains a nmixture of gases under constant atmosphcric pressure. The gases undergo a chemical rcaction. Upon reacting, the gases absorb 877 J of heat from the surroundings and the surroundings do 0.248 U of P work on the gases. What is the value of ∆H in joules for this process?
∆H= ? J

what is the value of ∆E in joules for this process?

According to the diagram; a) identify the anode of the cell and write the half-reaction that occurs there b) write the overall equation for the reaction that occurs as the cell operates c) calculate the value of the standard cell potential ,e cell. d)write the shorthand notation of the cell above e)indicate the flow of the electrons on the diagram

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.

Find the mass, in grams, of 5.00*10^23 molecules of f2