1. A compound R2O3 is 32.0% oxygen. What is the molar mass of R2O3 ? What is the element represented by R?

Q: Complete each nuclear reaction. a. 21084Po→206Pb         b. Fe → 52Mn + β+ + γ             c. 208Tl…

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Q: The molecule 1,3-cyclotetradiene shown below is which of the following according to Hückel's rules?

A: Given : structure of molecule.

Q: Balanced chemical equation: nonsupo formado boomein -0-3-3² Ni Cl₂ + Na2CO3 -> 80 HOU+H-0- Balanced…

A: A question based on stoichiometry that is to be accomplished.

Q: the second half of the questio was not answered and that was the part I was really struggling with

A: Answer-2 When work is done by the system against a constant external pressure, it will be the…

Q: Determine the radius "r" of an impurity atom that will just fit into a tetrahedral site of BCC iron…

A: Given, Iron has BCC crystal structure

Q: Exercise calculate the mean and standard deviation of the following set of analytical data. 15.67,…

A: The formula to  calculate mean is given as Mean = [Sum of all data points]÷ [Total numbers of data…

Q: provide a step-by-step mechanism. show the structure of each intermediates and use curved arrows to…

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Q: Combining 0.376 mol Fe₂O3 with excess carbon produced 20.0 g Fe. Fe₂O3 + 3C2Fe + 3 CO What is the…

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Q: Use Graham's law of effusion to calculate molar mass. A sample of krypton, Kr, effuses through a…

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Q: Gaseous methane CH4 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and…

A: Given: The mass of methane reacted = 0.16 g The mass of oxygen reacted = 0.48 g The mass of carbon…

Q: H H¬C-H + 2 O=O H Express your answer in kilojoules to three significant figures. ΔΗ = ΑΣΦ 0=C=O + 2…

A: Enthalpy of reaction can be calculated using bond energies. ∆H°rxn = bond energy of bond broken -…

Q: A 14.570 g sample of CaCl₂ was added to 12.085 g of K₂CO3 and mixed in water. A 3.556 g yield of…

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Q: the most stable conformation for 1 tert-butyl-3-methlyclohexane

A: Most stable conformation drawn considering the syn diaxial interaction, steric crowding, the size of…

Q: 1. Which intermolecular force occurs between nonpolar molecules. Select all that apply Hydrogen…

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

Q: For a 8.40×10-² M solution of H₂CO3, calculate both the pH and the CO3²- ion concentration. H₂CO3 +…

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Q: In May 2016, William Trubridge broke the world record in free diving (diving underwater without the…

A: Pressure decreases with an increasing altitude from the sea level. However, pressure increases with…

Q: Calculate the molarity of an acetic acid solution if 56.85 mL of the solution is needed to…

A: we need to calculate the molarity of acetic acid needed for the neutralization reaction given

Q: Antimony occurs in nature as a mixture mass of 120.9 amu and an abundance c abundance of the other…

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Q: In this lab, you are producing hydrogen gas in an electrolytic cell.  Provide the balanced half…

A: Lab question 1:  A) Given: Moles of Hydrogen = 4 mol To determine: Moles of electrons that were…

Q: Zinc metal reacts with hydrochloric acid according to the following balanced equation: Zn(s) +…

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Q: mechanism that explains the formation of the following product. In your mechanism, explain the cause…

A: In this question, we have to explain the steps in the given mechanism.

Q: An apparatus was set up like in this experiment. A student measured 13.0 cm of water in the tube…

A: Given data: Atmospheric pressure  = 30.0 in Hg Height of water above the water surface in flask =…

Q: Complete each nuclear fission reaction.

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Q: Arrange the following compounds in order of increasing acidity or basicity. Give a brief reasoning…

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Q: Titration #1 Titration #2 Titration #3 The concentration of NaOH (M) 0.9554 0.9540 0.9551 Using the…

A: According to question, concentrations of NaOH in 3 trial of titration,  c1= 0.9554 M c2 = 0.9540 M…

Q: - k. SH HI excess CH3CO3H

A: The above reactions can be completed by filling the reactants, reagents or products with the help of…

Q: 1) The compounds below are considered: Br O stereoisomers O constitutional isomers O identical O…

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Q: 7 In the blank, write the number that completes the chart. Manganese-55 # Protons 25 # Neutrons #…

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Q: The number of unique carbons in a molecule will correspond to the number of signals in the ¹³C NMR…

A: The number of carbons are identified by the environment around carbon.  If the carbon have same…

Q: Determine the pH during the titration of 14.9 mL of 0.149 M nitric acid by 7.12x10-2 M potassium…

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Q: The amount of I2 produced by the persulfate-iodide reaction when the blue color appears is the same…

A: Iodine-Clock reaction : Step 1: S2O82- + 2I-→2SO42-+I2 Step 2: 2S2O32-+ I2→S4O62- + 2I- Step 3:…

Q: The concept of determining which reactant is limiting and which is in excess is akin to determining…

A: First we would write the sandwich making as a reaction between bread and cheese.  a.) Then using the…

Q: Rank the following compounds in order of increasing solubility in water. Explain how you came to…

A: Here given compounds are - alcohol, acid, carboxylate salt and ester. We have to compare solubility…

Q: مد CI byl H 1. NaBH4, CH₂OH 2. HCI, H₂O 1. NaBH, (0.25 eq.), CH₂OH 2. HCI, H₂O 1. NaBH₁, CH₂OH 2.…

A: We have to give the products of the given reactions. Concept: We know that the sodium borohydride…

Q: Name the following structures according to IUPAC rules

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Q: Experiment name : Single Electrode Potential (electro chemistry) Q1:Purpose of experiment Q2: Theory…

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Q: If your lab partner had failed to look up the vapor pressure of water and assumed that it was zero,…

A: Given Experiment: Calculating Avogadro’s Number Using Electrochemistry The Vapor pressure of water…

Q: 1.Identifying if lonic or Covalent bond and show how they form their bonds. 1.Show how Mg and Cl…

A: Dear student since you have asked multiple questions but according to guidelines we we solve 1st…

Q: What is the hybridization at each of the carbon atoms? Drag the appropriate labels to their…

A: sp hybridization - The overalapping of one s orbital and one p orbital. sp2 hybridization -…

Q: provide number of NMR signals

A: Given : structure of molecules Tip : H NMR signals : types of hydrogen

Q: During the experiment, you will perform many different procedures, and the final results of your…

A: A calorimeter is a device with the help of which we can measure the temperature of a chemical…

Q: A student dissolves 12.6 g of lithium chloride (LiCl) in 200. g of water in a well-insulated open…

A: Given data   12.6 g of lithium chloride (LiCI) in 200. g of water  temperature =20.0 C to 33.2…

Q: Compare the solubility of silver iodide in each of the following aqueous solutions: 0.10 M AgNO3…

A: Explanation :

Q: Succimer (C₄H₆O₄S₂) is used as a heavy-metal poisoning chelation treatment. Its aqueous solubility…

A: Given that  Succimer (C₄H₆O₄S₂) is used as a heavy-metal poisoning chelation treatment. The aqueous…

Q: Question 7 Why does an ionic bond have a high melting point? A lot of energy is required to overcome…

A: Ionic bond are held together by strong attractive forces between cation and anion. This bond is much…

Q: Why is it important that we are very careful in how much acid is added to neutralize the reaction?…

A: If too much acid is added during crystallization after neutralization value then acid will increase…

Q: Calculate the number of moles in 2.70x1015 atoms of 4He.

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Q: An unknown substance has a mass of 25.9 g. The temperature of the substance increases from 28.7 °C…

A: Mass of Unknown (m) =25.9 g Change in Temperature (ΔT) = 42.9°C - 28.7°C = 14.2 °C Heat added (q) =…

Q: Which does not have the same volume as 1.0 mol of N₂(g) at 1.0 atm and 15°C? a mixture of 0.5 mol of…

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Q: An irregular lump of an unknown metal has a measured density of 5.26 g/mL. The metal is heated to a…

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.