Hydrolysis of the compound B5H9 forms boric acid, H3BO3. Fusion of boric acid with sodium oxide forms a borate salt, Na2B4O7. A.)Without writing complete equations, find the mass (in grams) of B5H9 required to form 157 g of the borate salt by this reaction sequence. Part B: Zinc sulfide reacts with oxygen according to the reaction: 2ZnS(s)+3O2(g)→2ZnO(s)+2SO2(g) A reaction mixture initially contains 3.4 mol ZnS and 7.4 mol O2. Once the reaction has occurred as completely as possible, what amount (in moles) of the excess reactant remains? Express your answer using two significant figures. Part C: Iron(III) oxide reacts with carbon monoxide according to the equation: Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g) A reaction mixture initially contains 22.40g Fe2O3 and 14.00g CO. Once the reaction has occurred as completely as possible, what mass (in g) of the excess reactant remains? Express your answer to three significant figures.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Hydrolysis of the compound B5H9 forms boric acid, H3BO3. Fusion of boric acid with sodium oxide forms a borate salt, Na2B4O7.
A.)Without writing complete equations, find the mass (in grams) of B5H9 required to form 157 g of the borate salt by this reaction sequence.
Part B:
Zinc sulfide reacts with oxygen according to the reaction:
2ZnS(s)+3O2(g)→2ZnO(s)+2SO2(g)
A reaction mixture initially contains 3.4 mol ZnS and 7.4 mol O2.
Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g)
A reaction mixture initially contains 22.40g Fe2O3 and 14.00g CO.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 4 images
