In the coulometric titration of U4+ in the presence of excess Ce3+, it was found to require 652 seconds to reach the equivalence point using a constant current of 100.0 mA. How many moles of U4 + were present in the solution? U 4++2Ce4++2H2O ⇄ UO2 2++2Ce3++4H+

increased stability in the completion of fluorine's outer shell.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

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