. In mining, roasting is the oxidation of metal sulfides to produce metal oxides and sulfur dioxide, a typical example is zinc sulfide: 2 ZnS + 3 O2 - 2 ZnO + 2 SO2 When 100.0 g of zinc sulfide reacts with 70.0 g of oxygen according to the above reaction, calculate the grams of excess reactant left unreacted. A) 23.71 B) 23.00 C) 20.70 D) 21.50 E) 24.00

Q: An unknown element X forms a coordinate compound in the presence of Cl-, [XCl2]. If 1.66 moles of X…

A: Given: Initial moles of X7+ = 1.66 mol. Initial moles of Cl- = 15.5 mol. Volume of solution = 4.32 L…

Q: Solar energy is: O the energy stored within the structural units of chemical substances. O the…

A: To define: Solar energy.

Q: 2. If the standard enthalpy change, (AH°) and the standard entropy change, (AS°) for the dissolution…

A:

Q: Br2(l) + 2 e - 2 Br (aq)E° = +1.09 V Min°+ (aq) + 2 e -- Min (s) E° = - 1.18 V which of the…

A: We have to find the strongest reducing agent.

Q: Which of the following 10 points statements about the acidity of the protons A,B&C is true ? H. H H…

A: ->For Acidity we see stability of conjugate base if conjugate base more stable then it is more…

Q: Consider these reactions: Reaction 1: H2 (g) + Cl2 (g) → 2HC1(g) AH = -184.6 kJ Reaction 2: 20F2 (g)…

A: `Given the reaction: H2(g) + Cl2(g) → 2HCl(g) ∆H = -184.6 kJ We have to calculate the mass of…

Q: 4. A cell uses the following reaction: a. Zn (s) + 2 H* (aq) → Zn²* (aq) + H2 (g) (a) Determine the…

A:

Q: *Given the following information, answer the questions 6 and 7 Acid NH3 HC=CH pKa Acid pKa CH;CH:OH…

A:

Q: Organic compounds that contain large proportions of nitrogen and oxygen tend to be unstable and are…

A: Given that, a reaction is C2NO6 → 2NO2 + 4NO + 2CO2. The reaction in the CCl4 solvent is first order…

Q: 7. Calculate the percentage of oxygen in carbonic acid H2CO3 A) 75.3% B) 72.0% C) 77.41%…

A: we need to calculate the percentage of O in carbonic acid

Q: 2. Calculate the bond length of the OH molecule in the gas phase if the first two lines of the…

A:

Q: If a urine sample has a pH of 5.50, calculate the concentrations of H3O+ and OH− in the sample.

A:

Q: • Observe the following reactions carefully: H2(g) + F2(g) 2HF(g) AH = -537 kJ > C(s) + 2 F2(g)…

A: The reactions given are, 1) H2 (g) + F2 (g) → 2 HF (g)                      ΔH = -537 KJ 2) C (s) +…

Q: Adding a nonvolatile solute to a liquid will A. elevate both the freezing point and the boiling…

A: Freezing point of solvent is greater than freezing point of solutions. Whereas boiling point of…

Q: When mercuric iodide is added to the aqueous solution of potassium iodide, the

A:

Q: Refer to the reaction below to answer number 43 to 45.

A:

Q: 3. Assuming standard states for all reactants and products, determine the spontaneous direction of…

A: The reactions given are, 1) Cu + 2 HCl → CuCl2 + H2  2) Ag + FeCl3 → FeCl2 + AgCl

Q: Tetrahvdrocannabinolic acid (THCA), the precursor to THC, a psychoactive: H.C H.0

A:

Q: A reaction, run at 298 Kand constant pressure, is found to have a standard Gibbs free energy of…

A:

Q: Could you balance the following and explain few details of how the following balanced in order for…

A:

Q: 1. A sample of 25.3 grams of BaSO, is mixed with 18.6 grams of Na3PO4- A) Determine which is the…

A:

Q: Which of the following substances are strong electrolytes? HClO3, HC2H3OO, NH3, HNO3, KCl, C6H12O6.…

A: The substances given are HClO3, HC2H3OO, NH3, HNO3, KCl and C6H12O6.

Q: A strong electrolyte is one that in aqueous solution: A) react B) is associated C) disappear D)…

A: Given statement :-  A strong electrolyte is one that in aqueous solution:  Choices :  A) react B) is…

Q: Your teacher asks you to dilute 6.0 M HNO3 (M1) to 250. mL (V2) of 1.0M HNO3 (M2). What volume (V2)…

A: Given Molarity(M1) = 6.0 M Volume (V1) = ?  Molarity (M2) = 1.0 M Volume (V2) = 250.0 mL

Q: 000 1 K=- K=2 At equilibrium? At equilibrium? yes no yes no K 4 & = K= At equilibrium? At…

A: Given:

Q: Referring to the figure below, what volume of the titrant was used to reach half-neutralization…

A: The titration curve given is,

Q: II. Balance each redox reaction in acid solution using the half reaction method. 9. As → H2ASO4 ¯ +…

A: Given that -  Unbalanced redox reaction -  As -----> H2AsO4 + AsH3  On deviding into half…

Q: Epinephrine contains the __ group that is absent in norepinephrine. The donor of this group is…

A: epinephrine: It another name is adrenaline, this is a hormone that is secreted mainly by the medulla…

Q: 14. The grams of SO2 produced will be: A) 65.70 B) 72.00 C) 81.35 D) 61.66 E) 63.59

A: SO2 molecular weight = 64. Therefore 1 mole of SO2 compound weight is equal to 64 grams ( 63.59).

Q: Refer to tne reactiOH Below 1o ans Items HBr- -> --- CIH CIM CIH

A: ->One double bond required one mole of HBr .

Q: Consider the following chemical reaction at equilibrium Co(g)+ H2O (g) co2(g)+H2(g)Of H2 is removed…

A:

Q: Find the molar solubility of BaCrO4 (Ksp= 2.1 × 10−10) in   (a) pure water  ____ × 10___M   (b) 3.8…

A:

Q: Identify the reagents needed to achieve the following transformation. If any of the steps aren't…

A: We have to carry out the given transformation.

Q: At 1275 K, ∆G° = 18.1 kJ/mol for the reaction 3 A (g) + B (g) → 2 C (g). If the partial pressures of…

A:

Q: Part C A sample of neon initially has a volume of 2.50 L at 20. °C. What final temperature, in…

A: Charle's law

Q: [4] Write down an expression for the average potential energy of a harmonic ocillator in the first…

A: This is how we can calculate

Q: 1. Calculate the moment of inertia, I, of the molecule 'H35CI when the masses of the two atoms are…

A:

Q: What volume (in ML )of 0.2200M HCl is required to neutralize 60.00 ml of 0.7000 M KOH

A:

Q: Post Lab Questions 1. Are there any deshielding effects seen in your NMR? What is causing this…

A: 1) Yes , there is de-shielding effects can be in the nmr spectra of the given compound. There are…

Q: Calculate the equilibrium constant at 25C for the reaction of methane with water to form carbon…

A: Thermodynamics is branch of chemistry in which we deal with amount of heat evolved or absorbed…

Q: Which alkene is predicted to be the most stable? II II IV

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: H. ame the compounds

A:

Q: A sample of a colored analyte at a concentration of 3.60 ´ 10-3 mol/L shows 34.2 percent…

A: #(a): Given the concentration of the analyte, C = 3.60*10-3 mol/L or M %T = 34.2 %

Q: A chemist gathers 3924Kj from combusting 65g of ethane What is the deltaH of a 93% yield

A: Given the mass of ethane taken = 65 g  Experimental amount of heat released during combustion = 3924…

Q: Calculate the H3O+ concentration from each pH: (a) 2.42;    (b) 13.39.

A:

Q: -Mannose + NABH,

A: What the reaction when mannose react with NaBH4 ----

Q: 2. Outline syntheses of the following compounds, starting with triphenylphosphine, an alkyl halide…

A: Wittige reaction : The reaction  between ylide and aldehyde results olefin. Stabilized ylides and…

Q: Which of the following can increase the observed potential in a galvanic cell?  a. ohmic…

A: Correct option is D.

Q: 8 Compound B and C are hydrocarbons with the structural formulae as shown beleu CH3 CH3 C (a) Name…

A:

Q: Name the alkyne. S

A:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".