(Q1) If a given 400dm3 of a gas was collected at 20°c and 720mmhg, what is the volume at S. T.P (Q2) At STP, a certain mass of gas occupies a volume of 780cm3. find the temperature at which the gas occupies 950cm3 and has a pressure of 726mmhg.
(Q3) At what pressure in atm will a gas which has a volume of 50dm3 at 15°c can occupies 60dm3 at 30°c and 203.4×10-3Nm-2.

Why are pipes bursting in the in extremely cold weather?

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.

Tell me the iupac names of the following alcohols: