Determine whether each of the following statements concerning solar photovoltaic cells or panels is true or false. The thickness of a CdTe thin film in a solar cell is about 2% the thickness of a sheet of paper. Solar cells have optimum efficiency with a bandgap energy of 1.4 ev, which is in the visible portion of the EM spectrum The efficiency of the best CdTe solar cells is less than 25%.

Q: Calculate both the pH and pOH for each of the solutions with the following hydrogen ion or hydroxide…

A:

Q: special sample of household vinegar contained 7.3% acidity. Determine the number of moles of acetic…

A: %mass of Aceticacid = 7.3 %  Mass of sample = 242 g Mass of Acetic acid= 242 × 7.3/100    = 17.7 g

Q: Joules can be converted into units of energy known as calories: 1 Joule = .24 Calories To convert…

A: Given: Total work = 1299 J

Q: 5 Draw the monomer used to produce the following polymer Polymer a Monomer

A: Monomer is a molecule of any of a class of compounds, mostly organic, that can react with other…

Q: 1. H₂S Total # of Valence Electrons: Lewis Structure (show all resonance structures if applicable)…

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

Q: Draw the major product of this reaction. Ignore inorganic byproducts and the alcohol side product.…

A:

Q: der the compounds from lowest vapor pressure to hig b. CH3-CH2-O-CH2-CH3 CH3CI HO-CH2-CH2-OH Da.…

A: Vapor pressure is the pressure exerted by liquid Vapor over the surface of liquid.  As higher the…

Q: Which should be least soluble in water? Н H-C-0-H methanol H H II H-N-C-H methylamine H H H 01H Η T…

A:

Q: K,SO, is a strong electrolyte. Determine the concentration of each of the individual ions in a 0.750…

A: When an acid reacts with a base it produces salt and water. Such reactions are known as acid-base…

Q: Draw the product of the reaction shown below. Ignore inorganic byproducts. OH DMSO, (COCI)2 Et3N,…

A:

Q: The following isotopes are all stable : 20Ne, Ne, 22Ne 10+ 10- While the following is not, so what…

A:

Q: НО ОН Н H₂/Pd-C Br HO 12 1. H/CH₂OH 2.TMSOT!/ Et,N: NBS CH₂01 1. Et₂SiOT! 2. CHBr 13 /1-BUOK Br Br…

A: Step 1 ( 8 to 9). (i) Ketal formation. (ii) Hydrogenation. Step 2 ( 9 to 10) (i) TMS ether…

Q: (Q69) Using the tabulated values from the text (located in Appendix G, beginning at p. 1211)…

A: Calculate gibbs free energy of the given reaction---

Q: Identify the change in phyical state that is a decrease in entropy.   water boiling   ice melting…

A: Entropy is the measurement of randomness of any substance , if randomness decreases entropy decrases…

Q: For an ideal monatomic gas, the following is true. (Use the following as necessary: T, U, and V.)…

A: Step 4 To determine the value of dUdVT  for Ideal monoatomic gas.

Q: Find K for the following reaction at at 25°C. E cell = -0.10 V Cd²+ (aq) + Fe(s) -----> Cd(s) + Fe²+…

A: We have to predict the K for the reaction.

Q: With a high value of N/Z, an isotope will tend to decay through Positron Alpha Electron capture Beta

A:

Q: Which of these is a good alternative name for photochemical smog? Group of answer choices London…

A: Given,  Which of these is a good alternative name for photochemical smog? Group of answer choices…

Q: A Provide the best mechanism for the illustrated reaction. Please name each elementary (8) step…

A: In presence of Rhodium catalyst cross coupling reaction occurs. The presence of CO further extends…

Q: For the reaction below… a. Balance using the half-reaction method. Show your work. b. Determine the…

A: a.) To balance given redox reaction , first determine oxidation and reduction half reaction and…

Q: The pH of a 0.24M solution of pentanoic acid (HC, H,0,) is measured to be 2.73. Calculate the acid…

A: In this question we have to tell the pH of the solution.

Q: 1) Which one of the following terminal alkyne reactions KMnO4 (a) — (b)- H₂O, heat BH3.THF H₂O₂ (c)…

A:

Q: What is the pH of a 3.79×10-3 M  aqueous solution of hydrochloric acid?

A: pH of solution is given the information about acidic and basic nature of solution. If pH = 7 then…

Q: synthesize each from benzene and sketch the following: H-NMR; C-NMR; MS, and IR for the compounds:…

A: To synthesize ortho amino phenol from benzene and provide 1-H NMR, C-NMR, MS and IR for ortho amino…

Q: 4. Which one of the following compounds would be soluble in 1.5 M aq. NaOH and in 1.5 M aq. NaHCO;…

A:

Q: Absorbance vs. Concentration y = 0.2755x 0 0.200 0.400 0.600 1.000 1.200 1.400 1.600 1.800 2.000…

A:

Q: What is the answer to this problem? A mixture of gases consists of Na, O2, H, and F2- The total…

A:

Q: 4) Pick which one of the conjugated dienes would be preferred for 1,2-/1,4-additio Diels-Alder…

A:

Q: Question 3:, following transformations. Make sure to include any proton transfer that takes place as…

A: below full mechanism step by step is show

Q: Mass of iodovanillin = 0.1590g Vanillin mass = 0.2090g moles of iodovanillin…

A:

Q: 14) 15) X- 16) HH x OH or OH

A: We have to give the required transformations.         N.B. According to the company guidelines, we…

Q: A 50.0 ml. solution of 0.108 M KOH is titrated with 0.216 M HCI. Calculate the pH of the solution…

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

Q: QUESTION 12 Which describes the functional group(s) of the following molecule? .. CH;CHÖCH; CH3 O…

A: Functional groups is a substituent group attached to an organic compound which is  responsible for…

Q: 4a. Which type of molecule is this? Label the nonpolar and polar regions of this molecule. Label the…

A: Here we have to identity the lipid and polar and nonpolar regions and hydrolysis products formed.

Q: wing questions about this cell. If you need any electrochemical data, be sure you get it from 00…

A: In galvanic cell,  reduction takes place at cathode and oxidation takes place at anode.

Q: 06. Calculate the standard change in enthalpy (AH°) for each re- action and tell whether the…

A: (a)-> N2(g) + 3H2(g) -----> 2NH3(g) (b)->Ca(OH)2(s) -----> CaO(s) + H2O(g) ->Answer…

Q: pH 1 Select Draw Rings More C H N CH, CH₂ £ H,C =CH H₂N C H O O H Erase pH 13 Select Draw Rings C…

A: Given : We have to predict the structure of given amino acid at different pH.

Q: Heliox is a helium-oxygen mixture that may be used in scuba tanks for divers working at great…

A: Given: Volume of helium gas = 6.25 L Pressure of helium gas = 1.260 × 103 psi Volume of oxygen gas =…

Q: The mole fraction of cyclohexane in the vapor phase exceeds 0.50 when it is in equilibrium with…

A: Answer: Cyclohexane and benzene mixing would form an ideal solution, where vapor pressure of…

Q: Feedback Consider the titration of 100.0 mL of 0.8 M H₂A by 0.8 M KOH for the next three questions.…

A: Answer: This is a question based on acid-base titration of polyprotic acid (H3A) against a strong…

Q: 50. Calculate the kinetic energy of an electron ejected by a photon with wavelength 2.07×102 nm from…

A: We have to predict the kinetic energy of the electron.

Q: Very different concentrations of Na+ ions exist in red blood cells (12 mM) and the blood plasma (165…

A: Given: Concentrations of Na+ ions exist in red blood cells =12 mM Concentrations of Na+ ions exist…

Q: Identify the molecular orbitals for cyclopropenyl. Select all that apply. O π2 □ π3* Oπ₂* Oπ* 03 Oπ4…

A: when two orbital of comparable energy are mixed then molecular orbitals is formed .

Q: Why are some mechanism considered as exact straight mechanism?

A: the solution is shown below.

Q: 5. NO₂¹ Total # of Valence Electrons: 3-D Model Sketch Lewis Structure (show all resonance…

A: We have find out the total valence electron, polar bond, molecular shape , geometry and bond angle…

Q: What is the sign of Δ S for the reaction below as written?    N2O4(g)  ---------> N2(g)  +  2 O2(g)…

A: Answer: Entropy is the measure of disorderliness or randomness of the system. In more possible…

Q: A) Determine if the following changes in oxidation state are reduction or oxidation How many Changes…

A: Oxidation is an increase in the oxidation state Reduction is an decrease in the oxidation state

Q: Which of the following radiation would become attracted to the positive (+) end of a magnet? Alpha…

A: ★ Anawer :  'Beta' radiation would become attracted to the positive (+) end of a magnet. ★…

Q: Draw structure for the form of glycine present in basic solution.

A: Draw structure of glycine in basic solution --

Q: What is the pH of a 0.460 M solution of HF (Ka = 6.8 × 10⁻⁴)?

A: