For the complete combustion of 1.000 mole of ethane gas at 298 K and 1 atm pressure, AH = -1560 kJ/mol. What will be the heat released when 4.42 g of ethane is combusted under these conditions?

-230 kJ
230 kJ
10588 kJ
-10588 kJ
none of these

Why are pipes bursting in the in extremely cold weather?

Geothermal energy for industrial use is available almost anywhere. a. true b. false

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.