What is the heat of combustion of candle wax in kJ/mol? The standard heat of formation of candle wax (C20H42) is -2230 kJ/mol. The standard heats of formation of carbon dioxide gas and liquid water are -394 kJ/mol and -286kJ/mol, respectively

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

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.

Complete each row of the table below by filling in the missing prefix or missing exponent.