Searches related to Two identical beakers with exactly the same amount of warm water were prepared. Th e first beaker was allowed to cool by sitting in a classroom with an air temperature of 233 degrees C. The second beaker was placed in a large bucket of ice water at 0 degrees C. The temperature of each was measured every minute for 45 minutes. Which beaker of water starts off at higher temperature?

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explanation:

it's c. elements are placed in rows based on how may valencies electrons have.

  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-