What is the mass of 9 atom(s) of copper in grams?

The crust of earth may a- continets and ocean floors. b-continents only. c-layers of sedimentary rocks and continents. d-all of the above

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units: