What is the effect of doubling the photon flux of light on whether electrons will be emitted from a metal?

A. Light with greater photon flux is more likely to cause electrons to be emitted than the weaker light.
B. Light with greater photon flux will cause electrons to be emitted with faster velocities than the weaker light.
C. Light with less photon flux must shine for a longer time to cause electrons to be emitted.
D. The photon flux has no effect on whether electrons are emitted or not.

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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 .

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