13. if 335 g of water at 65.5 °c gains 9750 j of heat, what is the final temperature of the water? liquid water has a
specific heat of 4.18 j/(g°c).

  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-

it's all four options.

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)