A sample of 3.785 g of a compound is analyzed, and found to contain 1.302 g Fe and 2.483 g Cl. Another sample of the compound is found to contain 2.329 g of Cl. How many grams of Fe will it contain

1.221g

Explanation:

First Sample

Ratio of  Fe and Cl is given as;

Mass of Fe: Mass of Cl

1.302g : 2.483g

Second Sample;

Mass of Fe: Mass of Cl

xg : 2.329g

The ratio between both elements is constant in both samples, so we have;

Ratio of first sample = Ratio of second sample

1.302g : 2.483g = xg : 2.329g

1.302 / 2.483 = x / 2.329

x = (2.329 * 1.302) / 2.483

x = 1.221g

  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-