In a common experiment in the general chemistry laboratory, magnesium metal is heated in air to produce mgo. mgo is a white solid, but in these experiments it often looks gray, due to small amounts of mg3n2 , a compound formed as some of the magnesium reacts with nitrogen. write a balanced equation for each reaction.

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

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.

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?