Which of the following semiconductor  has the lowest band gap? Group of answer choices Ge Pb Sn Si

Q: A chemical reaction has an equilibrium constant, Kc= 0.02. Which of the following is true?   Group…

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Q: Calculate the binding energy (in Joules) of a nuclide 112X48 from the following information: mass…

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Q: T A gas of unknown identity diffuses at a rate of 89.3 mL/s in a diffusion apparatus in which carbon…

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

Q: Aluminum reacts with aqueous sodium hydroxide to produce hydrogen gas according to the following…

A: we have to calculate the mass of H2 produced

Q: Calculate the amount of heat needed to melt 22.2 g of solid octane (CgH₁g) and bring it to a…

A: Given: Mass of solid octane (m) = 22.2 g Final temperature = 69.4oC Known: Heat of fusion of octane…

Q: Draw the major product of this reaction. Ignore inorganic byproducts.

A: Alkyne reacts with two molecules of HBr to form dibromoalkane.

Q: Predict the major product for this reaction. Ignore inorganic byproducts.

A: Disiamylborane (Sia2BH, THF) is used for hydroboration–oxidation reactions of terminal alkynes. In…

Q: 5.50 g of As₂O3 are titrated with 33.5 mL of KMnO4 to reach the end point. 5 As₂O3(s) + 4 MnO4 (aq)…

A: Given -> Weight of Ag2O3 = 5.50 gm  Volume of KMnO4 = 33.5 ml = 0.0335 L (1L = 1000ml)

Q: 46. What is shown on Figure 1? Draft a figure caption (max. 50words). (a) 1 pm-10-10 c cm 1s 2s 3s…

A: The concept used here is from quantum mechanics of physical chemistry.  Here we have to study…

Q: Calculate the volume in liters of 40 moles of toluene. 0.87g/ml densi

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Q: A galvanic cell is powered by the following redox reaction: MnO4(aq) + 2 H₂O(1) + 3 Cu* (aq) MnO₂…

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Q: Given a generic battery of: A2+(aq)  +  B(s)  --->  A(s)  +  B2+(aq) If you were given the cell…

A: We are given the cell potential for the following reaction to be 1.65 V.  A2+ (aq) + B(s) →A(s) +…

Q: a b. C. d. 27. e. The kinetics of the reaction, 4 HBr(g) + O2(g) → 2 H₂O(g) + 2 Br2(g), was studied…

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Q: Consider a voltaic cell constructed from standard Q2+/Q and D+/D electrodes. Q and D are symbols of…

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Q: Which of the following descriptions correctly describes the silicate glass in the bulb of a pH…

A: 1. To determine which of the following descriptions correctly describe the silicate glass in the…

Q: 18. Which compound(s) is(are) optically active? I (A) I and II (C) II only CI II CI OH OH III (B) II…

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Q: 4. MATCH a structure from the list below to the following IR spectra. Place the letter of the…

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Q: What are the differences between (properties wise) graphite, graphene, carbon nanotubes, and…

A: graphite, graphene, carbon nanotubes, and graphene oxide  these all are different form of carbon and…

Q: Question 13 of 41 Using the equations - 2 Fe (s) + 3 Cl₂ (g) → 2 FeCl (s) AH = -800.0 kJ/mol Si(s) +…

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Q: Which of the following statements concerning spectroscopy is correct? A) Concentration of a solution…

A: Spectroscopy involves the study of interaction of electromagnetic radiation with matter. When an…

Q: If 65mL of hydrochloric acid (HCI) is diluted with water to a total volume of 225 mL, what percent…

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Q: What helps drive this reaction to favor the formation of the product?

A: Aziridines are 3-membered cyclic amines whereas the oxazole is a 5-membered ring.

Q: The molecule below is achiral. CH3 ¿ True or False True False

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Q: What volume of 0.5 M NaOH will be required to neutralize 50 mL of 0.1 M of HCl ?   50 mL 250 mL 10…

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Q: a. On the two MO energy level diagrams on the next page, indicate one which has p–s mixing and which…

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

Q: 36. a. b. C. d. e. Given the following redox reaction at 298 K: Au (aq) + 3 Li (s) → Au (s) + 3 Li…

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Q: Write a nuclear equation for the type of decay each of these unstable isotopes is most likely to…

A: A question based on nuclear reaction. Four equations based on alpha, beta and positron decay are…

Q: 1. NaOEt, room temperature 2. PhCH2Br (1 equiv) OH Select to View feedback X

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Q: hypothetical element (X) has an atomic mass of 114.9 g/mol and crystallizes with a Body Centered…

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Q: How many grams of CaCO3 will dissolve in 2.50×102 mL of 0.0480 M Ca(NO3)2?  The Ksp for CaCO3 is…

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Q: Complete the balanced neutralization equation for the reaction below. Be sure to include the proper…

A: HCl is a strong  acid and NaOH is a strong base. When strong  acid and strong  base react each other…

Q: V 3 2 1 0 лами ах Mi m W m Y3 (x) 4/₂(x) Y₁ (x) y (x) 0 X (a) 0 X (b) E \(x) n \,(x) | Sh |v₁…

A: The concept used here is from Quantum mechanics of physical chemistry.  Here we have to deal with…

Q: Classify each chemical reaction: reaction Na₂S (aq) + FeCl₂ (aq) → 2NaCl(aq) + FeS (s) -> 2CH, (CH₂)…

A: We are given 4 reactions, and asked to classify these as the type of reaction to which they belong…

Q: The activation energy, Ea, for a particular reaction is 13.6 kJ/mol. If the rate constant at 754 °C…

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Q: 1. If the HVL of lead for 60Co is 0.49 inches, what thickness of lead would be required to reduce…

A: 1) If the HVL of lead for 60Co is 0.49 inches Initial radiation, Io = 600 mrem/h Final radiation, I…

Q: isited Draw structural formulas for both resonance structures of the enolate ion obtained by…

A: When a base reacts with a compound, it abstracts the most acidic proton leading to the formation of…

Q: A voltaic cell is constructed in which the anode is a H₂|H+ half cell and the cathode is a CIICI₂…

A: Given that H2 cell is anode and Cl2 is cathode , it means hydrogen cell is oxidized and chlorine…

Q: What is the IUPAC name of the following compound? CHCHCOH OH

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Q: How many atoms are in 2.50 moles of SiO₂? 5.02 x 10²3 atoms 7.53 x 1023 atoms 3.01 x 10²4 atoms 1.52…

A: Given -> Moles of SiO2 = 2.50 mole

Q: Take a calorimeter that has 450 grams of ice at (-10°C). How many grams of gasoline would have to be…

A: To find out the amount of gasoline needed to be burned to take a calorimeter that has 450 grams of…

Q: What is the standard potential of an unknown M²+/M electrode if the following cell is constructed:…

A: Given, the cell notation: Pb|Pb2+||M2+|M The emf of the cell = 2.99 V The standard potential of lead…

Q: ANSWER ASAP PLEASE THANK YOU SO MUCH Identify the value of x (mass number of nuclide D) to complete…

A: It is an application of law of conservation of mass where a radioactive nuclide undergo a nuclear…

Q: Classify each chemical reaction: reaction HI (aq) + NaOH(aq) → Nal (aq) + H₂O(1) Na₂CO₂ (s) →…

A: In a Rxn , When two or more substances combine to form a new substance then this type of reaction is…

Q: Draw the Lewis structure of BrCl3 and then determine the ideal bonding angle(s) of the central atom.…

A: Bromine is of group 17 element so it must have 7 valence electrons and Cl is a monovalent atom so it…

Q: 6. Consider the reactions of amides, draw the main product for each (3 H₂C CI NH CH3 H₂O H₂O*…

A: Water is generally used for hydrolysis of amide . LiAlH4 acts as a strong reducing agent .

Q: You place a large medicine tablet in a glass of water so it can dissolve; however, it does not…

A: The rate of dissolving of a solute in a solution is influenced by several factors such as the size…

Q: the pOH a basic solution is 3.55 what is [H+]

A: Given: pOH of basic solution = 3.55

Q: Answer the following based on "like dissolves like." Will C5H12 mix with C6H6? [Select] Will NH3 mix…

A: Like compound dissolve like means, polar dissolve in polar compounds. Non-polar compounds dissolves…

Q: Alpha-methylstyrene reacts with Br2 in an acetone-water mixture to give predominantly the…

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Q: What is the percent by mass of a sodium hydroxide (NaOh) solution made by adding 83’grams of sodium…

A: Percent by mass of a solution can be determine from the mass of solute and solution.