Alum can be synthesized using the aluminum from recycled beverage cans. the procedure specifies that any paint and plastic on the aluminum should be removed prior to the first step in the synthesis. how would the given values be affected by paint and plastic on the 1 g aluminum sample?

An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling