Heartburn is a form of indigestion felt as a burning sensation in the chest when stomach acid comes back up into the esophagus. some people take an antacid to relieve heartburn. which best describes the antacid’s effect? the antacid is basic and will neutralize the base entering the esophagus. the antacid is basic and will neutralize the acid entering the esophagus. the antacid is acidic and will raise the ph of the esophagus. the antacid is acidic and will lower the ph of the esophagus.

  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-

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

i think is conclusions.i think so