A hypothetical student achieved a 125% yield of barium phosphate. Explain, briefly, why this result in unexpected.

Q: If 2.3 moles of NO2 (g) are produced per minute in a reaction, how many grams of it would be…

A: Molecular weight of NO2 =    =(14 + 2× 16)g/mol = 46 g/mol Weight = Number of mols × molecular…

Q: 4. How many grams of sulfur are produced if 2.215 moles of sulfur dioxide are decomposed into its…

A:

Q: A block of pure magnesium metal weighs 76.9 grams. How many moles of magnesium are present in the…

A: Mole= mass of Mg / molar mass of Mg Given - 1) mass of Mg =76.9              2) Molar mass of Mg=…

Q: If 75.0L of water vapor is produced, what mass of propane was consumed in the reaction

A: The volume of water vapor produced = 75.0 L 1 mole H2O means 22.4 L ? moles H2O means 75.0 L Number…

Q: how many grams of aluminum are required to produce 17.5 grams of hydrogen?

A: Given :- 6 NaOH + 2Al --> 2Na3 ALO3+3H2                 mass of H2 = 17.5 g   To be calculated :-…

Q: A student weighs out 94.53 grams of sodium permanganate, NaMnO4.  How many moles of NaMnO4 is this?…

A: Moles— It is the ratio of given mass of a compound to its molar mass  Mole = given mass / molar mass…

Q: Sand is mainly silicon dioxide. When sand is heated with an excess of coke (carbon), pure silicon…

A: Given : Silicon dioxide reacts with coke i.e carbon to produce silicon and carbon monoxide. Hence…

Q: What mass of SbF3 (179 g•mol ^-1) needed to produce 1.00g of Freon -12, CCl2F2 (molar mass =121…

A:

Q: If 34.0 g of MgSO4⋅7H2O is thoroughly heated, what mass of anhydrous magnesium sulfate will remain?

A: Given:Mass of  MgSO4⋅7H2O = 34.0 gWe need to find mass of anhydrous magnesium sulphate  produced…

Q: After determining the composition of a mixture of KClO3 and KCl, it is found that the calculated…

A: Here we are determining the composition of mixture by using decomposition of KClO3  and…

Q: How many grams of O2 will be consumed during the formation of 13.67 grams of Fe2O3? Report your…

A: Mass of Fe2O3 = 13.67 g

Q: hydrogen cyanide, HCN(g), can be made into steps.   If 15.0 G of ammonia, NH3(g), and 6.0 G of…

A:

Q: According to the following reaction, how many grams of mercury will be formed upon the complete…

A:

Q: What mass in grams of TNT can be made from 598 g C7H8?

A:

Q: uppose a 250. mL flask is filled with 1.2 mol of NO, and 2.0 mol of NO,. The following reaction…

A: Given equation is: 1.2 mol                   2 mol                                      -…

Q: Refer to the picture below. If 15.0 g of Mg and 150.0 g of AgNo₃ are allowed to react, find the 1.…

A:

Q: How many moles of glucose can be formed from 2.53 × 1024 H atoms?

A:

Q: Number of atoms of C in 10 moles of C4H10 are:     240.88x10^23 24.09x10^23 4.15x10^23…

A:

Q: Consider the decomposition of aluminum sulfide into aluminum metal and solid S₈ (one of the forms of…

A: Aluminum sulfide decomposes to form solid aluminum and sulfur (as S₈). The chemical reaction is:…

Q: One way to analyze for the amount of phosphorus in a rock is to precipitate the phosphorus as…

A: Precipitate of phosphorus MgNH4PO4 is heated to turn Mg2P2O7. Mass of Mg2P2O7 will be obtained from…

Q: When ammonia is mixed with hydrogen chloride (HCl), the white solid ammonium chloride (NH4Cl) is…

A: Given: The mass of ammonia is 10 g. The balanced chemical reaction is, Find the limiting reagent of…

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.