2.15(a) A sample consisting of Lo mol of perfect gas molecules with C = 20.87K 'is initially at 3.25 atm and 310 K. It undergoes reversible adiabatic
expansion until its pressure reaches 250 atm. Cakulate the final volume and
temperature and the work done.

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Aquantity of that isotope to decay to 1/2 of  its original value

Electron equations of the given changes are as follow,a)                              cu      →      cu⁺²  + 2e⁻b)                              mg⁺²  +  2 e⁻      →      mgc)                              cl⁻    →      cl  +  1e⁻d)                              s  +  2 e⁻    →      s²⁻e)                                o²⁻      →      o  +  2 e⁻f)                              p  +  3 e⁻    →      p³⁻g)                              fe²⁺    →      fe³⁺  + 1 e⁻h)                              s²⁻    →      s⁴⁺  +  6 e⁻

Bis the answer to the question