Which of the following transformations represent an increase in the entropy of the system. Choose all that apply 32 g Ag (liquid, 1.234×103K)32 g Ag (solid, 1.234×103K) 4 mol CH4 (6.48 L, 215K)4 mol CH4 (13.0 L, 215K) 21 g C5H12 (liquid, 309K)21 g C5H12 (gas, 309K) 3 mol CH4 (1.11 atm, 414K)3 mol CH4 (1.11 atm, 207K) 21 g C5H12 (liquid, 159K)21 g C5H12 (liquid, 294K)

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

that's what i got you can count the number of atoms

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.