Calculate the standard enthalpy of the reaction, δh∘rxn, for the thermite reaction: 2al(s) fe2o3(s)→2fe(s) al2o3(s) elements in their standard state have an enthalpy of formation value of zero. the standard enthalpies of formation of fe2o3 and al2o3 are δh∘f of fe2o3(s)

Determine the reaction and balance the following equations urgent due in the morning

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.

What natural processes produce large quantities of co2