A reaction of heating potassium permanganate produces potassium manganate, manganese dioxide and oxygen gas.
Heat 15.8 g potassium permanganate until no more oxygen gas
is given off. The remaining material has a mass of 14.2 g. What
mass of oxygen gas was produced in the reaction?
g

Why is the structure of molecule important to its function?

What is the work done by the electric force to move a 1 c charge from a to b?

A0.10 m aqueous solution of sodium sulfate is a better conductor of electricity than a 0.10 m aqueous solution of sodium chloride. which of the following best explains this observation? (a) sodium sulfate is more soluble in water than sodium chloride. (b) sodium sulfate has a higher molar mass than sodium chloride. (c) to prepare a given volume of 0.10 m solution, the mass of sodium sulfate needed is more than twice the mass of sodium chloride needed. (d) more moles of ions are present in a given volume of 0.10 m sodium sulfate than in the same volume of 0.10 m sodium chloride. (e) the degree of dissociation of sodium sulfate in solution is significantly greater than that of sodium chloride.