A current of 88.9 mA exists in a metal wire. How many electrons flow past a given crosssection of the wire in 9.12 min? The fundamental charge is 1.602 × 10−19 C. Answer in units of electrons.

The dissociation energy of a molecule is the energy required tobreak apart the molecule into its separate atoms. the dissociationenergy for a particular molecule is 5.48 x 10-18 j.suppose that this energy is provided by a single photon. determinethe (a) wavelength and (b) frequency of the photon

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging