Tin(IV) sulfide, SnS 2 , SnS2, a yellow pigment, can be produced using the following reaction. SnBr 4 ( aq ) + 2 Na 2 S ( aq ) ⟶ 4 NaBr ( aq ) + SnS 2 ( s ) SnBr4(aq)+2Na2S(aq)⟶4NaBr(aq)+SnS2( s) Suppose a student adds 38.5 mL 38.5 mL of a 0.450 M 0.450 M solution of SnBr 4 SnBr4 to 43.2 mL 43.2 mL of a 0.135 M 0.135 M solution of Na 2 S . Na2S. Identify the limiting reactant. a. NaBr b. SnBr4 c. SnS 2 d. Na2S Calculate the theoretical yield of SnS 2 . SnS2. theoretical yield: g g The student recovers 0.267 g 0.267 g of SnS 2 . SnS2. Calculate the percent yield of SnS 2 SnS2 that the student obtained. percent yield:

lol idk man i guess u gotta ask bill nye the science guy

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.

c. 4.54 x 10–12 j happens to be correct