What is the energy in joules of a single photon of light with a wavelength of 1 m

Which of these conditions most likely produces an unstable isotope?

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?

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