Which statement correctly describes an endothermic chemical reaction? A. The products have higher potential energy than the reactants, and the ∆H is negative.       B. The products have higher potential energy than the reactants, and the ∆H is positive.       C. The products have lower potential energy than the reactants, and the ∆H is negative.       D. The products have lower potential energy than the reactants, and the ∆

Q: What is the molar solubility of Sn(OH), in a buffer solution containing equal concentrations of NH, ...

A: 1.) To calculate solubility of Sn(OH)2 in buffer solution , we would first calculate pOH if buffer s...

Q: chemist needs to make 120.5 g of LiH, how many mL of 4.5 M solution of NaH must

A: Balanced chemical reaction,  2NaH (aq) + Li2CO3(aq) -->2LiH(s) +Na2CO3(aq)  Given,  Mass of LiH =...

Q: H H H H H H H H

A: Given : We have to edit the structure of butane to make butanoic acid.   

Q: 2. Pt* forms a complex with two ammonia molecules, one SCN and a Cl ion. a) What is the formula and ...

A: Charge on complex = 0 Coordination no. = 4 

Q: Is the AS positive or negative for the following reaction 02(g) + 1/2 02(g) → 03(g) O AS doesn't cha...

A: We have to predict the sign of change of entropy.  

Q: Use the References to access important values if needed for this question. Draw a structural formula...

A: When acid react with base , base can abstract most acidic hydrogen and form H2O .  

Q: Zinc reacts with copper sulfate in a single replacement reaction as follows                         ...

A: 1) Given, Zn(s) + CuSO4(aq)  --> ZnSO4(aq) + Cu(s)   Mass of zinc metal = 50 g Excess reactant = ...

Q: 2 Al(s) + 3 CuCl,(aq) → 3 Cu (s) + 2 AICI, (aq) A piece of aluminum metal is placed in an aqueous so...

A: We have to predict the two new species formed in the reaction.  

Q: IS

A: [HCl] = 0.0075 M HCl ----> H+ + Cl-

Q: In a lab, 14g of sodium is reacted with 20g of Oxygen. 4Na + O2+ 2N22O • Which reactant is the limit...

A:

Q: 4 Fe 3 0, 2 Fe,O3 AS° sys = - 225 J/K + AH° 0.0 0.0 -98.3 kJ/mol What is AS°uniy if AS° sys = - 225 ...

A:

Q: The ionization constant, K for HCN(aq) is 7.7 x 10 10, What is the pH of a 0.17 molar solution of so...

A:

Q: the specific rotation of sucrose is 66.5(°cm^3)/(gdm), what is its molar rotation? Molar mass of suc...

A:

Q: Q2) Consider the following third order reaction: A→ product The following is the integrated rate law...

A:

Q: How can we calculate the concentration (molarity) of OH- in a solution that is 0.0859 M NaOH at 25°C...

A: Given-> Molarity of NaOH = 0.0859 M  

Q: Identity the carbocation that is the most stable? a. CH2CH3 CH O b. CHCH, CH, с. CH d. CH,CH2 CH;

A: Carbocation is species in which carbon is carrying positive charge on carbon. In carbocation, carbon...

Q: Consider the galvanic cell shown with a standard hydrogen electrode (S.H.E.) as the left electrode. ...

A:

Q: To find Qut the nicked jon concentraion im a dolution Porepared Joy mixing 361m2 of oo414m uckel mit...

A: Given: Concentration of Nickel nitrate i.e. Ni(NO3)2 = 0.414 M Volume of solution = 361 mL = 0.361 L...

Q: Question 6 A Equation 1: X(s) + NiCl (aq) → Ni(s) + XCl, (ag) Equation 2: X(s) + MgCl2 (ag) → no rea...

A:

Q: Given a oreaction eH4 (8)+ 202°9) - >C०_8) +2 H20CI) C०-C8) +2H20C cq\culade मe णork (न k১)whn2.20 m...

A: Given : Number of moles = 2.20 moles

Q: culate the pH of a solution that is 0.0853 M LiNO2 at 25

A: Given : Molarity of LiNO2 = 0.0853M

Q: standard enthalpy of formation

A:

Q: The coefficients in front of H2O and NO in the balanced reaction for acidic conditions are:        ...

A: Reaction:-  Cu(s) + HNO3(aq) → Cu2+(aq) +  NO(g)  

Q: A. 990 B. 980 °C C. 98.0 °C D. 9.80 °C 16. A solution made by dissolving 9.81 g of a nonvolatile non...

A:

Q: Hello, good day. I have a problem answering this question, and I need your help. Hoping for a respon...

A: Answer - According to the question - Sedimentation and flotation are solid-liquid separation process...

Q: A buffer solution is 0.200 M in HC,H;O2, a monoprotic acid, and 0.200 M in NaCH,O2. K, for the acid ...

A:

Q: Number of Molecule valence electrons Formal Charge Electron-Group Geometry Molecular Geometry Resona...

A: To fill the table given in question, first we have to draw the Lewis structures

Q: An ideal gas at a pressure of 3.6 atm, a volume of 6.7 L , and a temperature of 30°C is placed in a ...

A:

Q: The pH of a solution containing 0.40 M CH,COOH and 0.20 M CH.COONa is For the acid, Ka =1.8X10 Answe...

A: Note: As per our guidelines, we are supposed to answer only one question when multiple questions are...

Q: 14. The balanced equation below represents the reaction of KOH with H,PO4. коНаq) + Н,РО,(aq) a KH,P...

A:

Q: 1. The strengths of an acid and that of its conjugate base are related: a) If the acid is strong, it...

A: The relationship between the acid strength and its conjugate base strength or strength of base and i...

Q: Consider the reaction at 298 K. 2 C(graphite) + O2(g) 2 CO(g) AH° = -221.0 kJ/mol > Calculate the qu...

A:

Q: Question 5 Which of following two half cells will form a galvanic cell with the greatest cell potent...

A: Cell potential is determined by  E°cell = E°red(cathode) - E°red(anode)  So more is the difference i...

Q: Acetic acid was dissolved in water to a concentration of 0.10 mol.L'. The pKa of acetic acid is 4.8....

A: pKa= 4.8 -log Ka = 4.8 Ka = 1.58 x 10-5  

Q: don’t understand the first part of the question with the: “You need 2 moles of magnesium…” How do I ...

A:

Q: 1. The structures of six organic compounds are shown below. H =H H2N (b) (c) `NH2 H2N ОН (d) (e) (f)...

A:

Q: Consider the following reactions and predict the AS°: I. C6H6(s) – C6H6(1) II. 2 SO2(8) + O2(8) → 2 ...

A: We have to predict the change of standard entropy for given reactions.

Q: Classify each definition or mathematical expression as describing, or derived from, one of the laws ...

A: Each law of thermodynamics have a mathematical expression and statement. 

Q: Requires a light source with a wavelength between 10 picometers and 10 nanometers X-ray crystallogra...

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for yo...

Q: 8. Dimethylamine (CH;),NH is a weak base with a pKa of 11.0 a. Calculate the pH of a solution of dim...

A:

Q: Draw a structural formula for the missing product in the following reaction. NaHCO3 H20 + ? + CO2 + ...

A:

Q: If an oxidation reaction occurs with an alcohol, what are you removing and what are you adding to yo...

A: It is quite necessary to write an example of oxidation process in order to get the question solved. 

Q: After graphing the appropriate variables for the linear Rydberg equation you obtain the following be...

A:

Q: An rxn with a rate constant k1= 2.0 x 10^-5/s at 650K and the Ea = 226 kJ/mol. What temp in K is the...

A: Given data : 

Q: An oral antibiotic is available as a powder for reconstitution. At the time of dispensing, the regis...

A: Given: %(w/v) of the drug solution = 0.5% Volume of the drug solution = 120 mL Volume of water added...

Q: 1. What is the general formula for saturated hydrocarbons? 2. How is the formula changed if one C=C...

A: Alkanes are saturated hydrocarbon whereas alkene and alkyne are unsaturated hydrocarbon. Weight of a...

Q: From the list of salts below, how many are considered insoluble at 25°C? CuCl2 CaSO4 PbS A93PO4 O on...

A: CuCl2 molecular size of the Cu metal is way more larger than the water molecules . That's why CuCl2 ...

Q: Number of Molecule valence electrons Formal Charge Electron-Group Geometry Molecular Geometry Resona...

A: Formal charge = NV - Nnb - Nb/2  Where Nv = Number of valance electrons  Nnb= number of non bonding ...

Q: For each chemical reaction listed in the table below, decide whether the highlighted atom is being o...

A: Identify oxidized and reduced species ----