A chemist prepares a solution of potassium permanganate KMnO 4 by measuring out 3.7 μmol of potassium permanganate into a 50. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in / mol L of the chemist's potassium permanganate solution. Round your answer to 2 significant digits.

The number at the end of an isotope’s name is the number.

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

An unsaturated hydrocarbon is a hydrogen-carbon compound with a. a network solid structure b. single bonds c. single bonds in a branched-chain structure d. double or triple bonds