Two students standing apart in a classroom have a gravitational force of attraction between them of 3.20 x 10-8 n. if one student has a mass of 50.0 kg and the other has a mass of 60.0 kg, what is the distance between the students? a. 2.86 m c. 1.25 m b. 3.07 m d. 2.50 m

How many miles of water are produced if 5.43 mol pbo2 are consumed

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

Who examines and coordinates the cleanup of polluted sites?