A laboratory technician must prepare a solution of sodium carbonate decahydrate, Na2CO3⋅ 10 H2O to perform some analyzes. (The 10 water molecules involved in the knowledge of crystallization that are part of the substance.) The laboratory manager quickly writes the following indications on a sheet of paper: Prepare 250 ml of 0.0500 M solution of sodium carbonate decahydrate, Na2CO3⋅ ⋅ ⋅⋅ 10 H2O per weigh, then prepare 100 ml 0.0250 M for dilution of the first.

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas

The diagrams to the right show the distribution and arrangement of gas particles in two different containers. according to kinetic-molecular theory, which of the following statements is true? check all that apply. if the temperatures of both containers are equal, container a has greater pressure than container b. if the volume of container a decreased, its pressure would decrease. if the pressure in both containers is equal, container a has a lower temperature than container b.

Who examines and coordinates the cleanup of polluted sites?