An object with a mass of 5.0 kg accelerates 8.0 m/s2 when an unknown force is applied to it. what is the amount of the force?

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

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.

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?