Which solution listed below yields the highest molar concentration? 121.45 g of KOH in 75.0 mL 23.49 g of NH4OH in 125.0 mL 217.5 g of LiNO3 in 2.00 L 15.25 g of Pb(C2H3O2)2 in 65.0 mL

The answer to your question is KOH (28.9 M)

Explanation:

Data

a) 121.45 g of KOH vol 75 ml

Molar mass = 39 + 16 + 1 = 56 g

                       56g 1 mol

                    121.45 g  x

                       x = (121.45 x 1)/56

                       x = 2.169 g

Molarity = 2.169 / 0.075

Molarity = 28.9 M

b) 23.49 g of NH₄OH vol 125 ml

Molar mass = 14 + 5 + 16 = 35 g

                      35 g 1 mol

                    23.49 g x

                      x = 0.67 moles

Molarity = 0.67 / 0.125

Molarity = 5.4 M                        

c) 217.5 g of LiNO₃ in 2L

Molar mass = 7 + 14 + 48 = 69 g

                       69 g 1 mol

                    217.5 g x

                      x = 3.15 moles

Molarity = 3.15 / 2

Molarity = 1.57

d) 15.25 g of Pb(C₂H₃O₂)₂ in 65 ml

Molar mass = 207 + 56 + 6 + 64 = 333 g

                  333 g 1 mol

                   15.25 g x

                   x = 0.046 moles

Molarity = 0.046 / 0.065

Molarity = 0.71

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.