G The temperature of a metal is initially 527°C. In order to increase the number of vacancies in this metal by a factor of 10, what should be the final temperature (°C) that the metal needs to reach? Assume that the density of the metal does not change during heating and the energy for vacancy formation is 60 kJ/mol.

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.