7. the molar mass of carbon is 12.0 g/mol, of hydrogen is 1.0 g/mol, and of oxygen is 16.0 g/mol.
how would you calculate the molar mass of ethanol (c2h60)?

• 9 mol * 6.02 x 10^23g
• 2 x 12.0g/mol + 1 x 16.0 g/mol
• 9 mol (12.0 g/mol + 1.0 g/mol + 16 g/mol)
• 12.0 g/ mol + 1.0 g/mol + 16 g/mol

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.