Approximately 2.81 × 1 0 21 electrons flow through the device when a current of 15.0 A is delivered for 30 seconds. This is calculated using the relationship between current, charge, and the charge of a single electron.
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The preparation method for French onion soup primarily involves finely slicing onions, caramelizing them, adding flour, and then including stock to create the broth. This process enhances the flavor of the soup through slow cooking and the natural sweetness of the onions. Thus, from the options provided, the correct answer is the one describing the onion preparation as finely sliced, caramelized, with the addition of flour and stock. ;