Assuming 50% efficiency, 150 kcals of chemical energy would result in of kinetic energy. A. 50 kcals B. 75 kcals C. 100 kcals D. 150 kcals Please select the best answer from the choices provided. A B C

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.