PLEASE HELP I HAVE NO IDEA WHAT TO DO Use the balanced equation below to answer the question. A student begins a reaction with 200.0 grams of C7H603. Calculate the percent yield of the reaction if 231.0 grams of C9H304 is actually
produced.
C7H. O3 + C4H8O3 C9H204 + C2H4O2

The percent yield : 88.4%

Reaction

Salicylic acid (C₇H₆O₃) reacts with acetic anhydride (C₄H₆O₃) to form acetylsalicylic acid (C₉H₈O₄)

2C₇H₆O₃(aq)+C₄H₆O₃(aq)⇒2C₉H₈O₄(aq) + H₂O(l)

MW C₇H₆O₃ : 138.12 g/mol

mol C₇H₆O₃

MW C₉H₈O₄ : 180.16 g/mol

mol C₇H₆O₃ = mol C₉H₈O₄ (mol ratio from equation 2:2), so mass of C₉H₈O₄

percent yield :

  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-