give an explanation of the semi-empirical mass formula

Q: How many electrons does an oxygen atom have in s orbitals?

A: • Oxygen is a chemical element whose atomic is 8 and is placed in group 16 in modern periodic table.…

Q: 1..If in a ligand substitution reaction several other ligands come in and it turns out to give…

A: In case of dissociative mechanism, the rate is independent of the incoming ligand and thus is only…

Q: Consider a saturated solution of AgBr in 0.010 M NH3. AgBr (s) Ag* + NH3 (aq) 5 Ag(NH3)* S Ag* + Br…

A: Solution - Balance equation - Balanced equations are those whose coefficients result in equal…

Q: Show whether the function V (0) = sin 0; 0 = 0- 2T satisfies the %3D normalization condition. If not…

A:

Q: Which of the following statements is false? O The absolute entropy of a perfect crystal at absolute…

A: Here, we have to find the statement from the given statements that is false.

Q: With reference to the following reaction scheme: LIAIH4 Et,NH HCI (cat.) A C3H180 B C12H25N Me Но…

A: We have to draw the structures of the compounds A-D.

Q: Reaction 3: N2 (g) + 202(g) 2NO2 (g) AH = +66.4 kJ Use Reaction 3. How much energy (in kJ) is…

A: Recall the reaction-- N2(g) + 2O2(g)-----> 2NO2(g) ∆H= +66.4 KJ

Q: O…

A: The given cations are Ca2+ and Pb4+ The given anions are Cl- and O2-    The ionic compounds are…

Q: elements will gain electrons

A:

Q: Calculate the cell potential of Cu-Fe galvanic cell at the following conditions: i) Standard…

A:

Q: Part A. Write the balanced equation for the reaction that produced the gas in this reaction Trial 1…

A: Given: Partial pressure of water at 23 oC = 21.1 mmHg = 0.0277 atm

Q: The compounds shown below is (1R,25,35)-3-chloro-2-methylcyclohexan-1-ol. Which is the following…

A: Detail solution is given below

Q: 1)write the election configuration long form for the following A) calcium B) aluminum 2) write the…

A: * Long form electronic configuration we write      all the electrons in their respective subshell .…

Q: Calculate the pH of a 0.125 M solution of KN3 at 25°C. Ka for HN3 is 2.5 x 105

A: Given data,Molarity of KN3=0.125 MKa of HN3=2.5×10-5

Q: (a) Which acid has the larger percentage of ionization: hydrofluoric acid or ethanoic acid? Fully…

A: A) both acetic acid and the hydrofluoric acid are weak acids ,but the acidity of the Hf is more than…

Q: Date Hour were measured before the experiment began and the data is shown below. The iron was left…

A: The reaction given is, => Fe + O2 → Fe2O3

Q: Diborane (B2H6) is a highly reactive boron hydride, which was once considered as a possible rocket…

A:

Q: How you would prepare 950 mL of a 1X CuSO4•5H2O solution from a 25X CuSO4•5H2O stock

A:

Q: Question 21 Explain your knowledge of structure and intermolecular bonding to explain the…

A: The melting point of ammonia is - 77.7°C whereas the melting point of lithium bromide is 552°C. This…

Q: 7. A sample of 25.0 mL of 0.100 M solution of HBr is titrated with 0.200 M NaOH. a Calculate initial…

A: Given: Concentration of HBr = 0.100 M Volume of HBr solution = 25.0 mL = 0.025 L…

Q: 7. (a) Predict whether, KCN, potassium cyanide will form an acid, base or neutral solution. (b)…

A: 7.(a) -  Potassium cyanide, KCN on dissolving in water gives an strong base potassium hydroxide,KOH…

Q: Which of the following is likely to give immediate results with Lucas reagent a. 2-methyl 2-heptanol…

A: Tertiary alcohol gives turbidity immediately with Lucas reagent .

Q: 24. Which of the following will be most likely a major product of the reaction in the box? HNO3…

A:

Q: 23 ml of 0.0916M NAOH neutralizes an unknown volume of 0.12 M HCI. If 74 mL of HCI was added to…

A: Given: Concentration of NaOH = 0.0916 M Volume of NaOH solution required = 23 mL = 0.023 L…

Q: An electric current of 124.0 mA transports 30.0 C of charge. Calculate the time this took. Be sure…

A: Given: Current = 124.0 mA = 0.124 A                                 (Since 1 A = 1000 mA) And the…

Q: Suppose a 250. mL flask is filled with 1.9 mol of Br,, 1.8 mol of BrOCl and 1.6 mol of BrCl. The…

A: Given: The volume of the flask is 250 mL The number of moles of Br2 is 1.9 mol The number of moles…

Q: The value of ΔE in kJ, for a system that does 213 kJ of work on its surroundings and loses 79 kJ of…

A:

Q: If a 1.54g sample of Zinc Oxide, 96.2%, were treated with 50ml of 1.0923N H2SO4 in the usual way,…

A:

Q: pestion 18 of 18 A current of 4.12 A is passed through a Ni(NO,), solution. How long, in hours,…

A:

Q: C) 30. In the presence of a nucleophile, which of the following will undergo conjugate addition?…

A:

Q: Suggest all the possible interactions that metoclopramide can interact with in physiological pH. CI…

A: To suggest all possible interactions that metoclopramide can have in physiological pH. The…

Q: Which statement about fusion enthalpy and condensation enthalpy is correct? O a. There is no general…

A: Fusion and condensation enthalpies are of two different processes.

Q: Ibuprofen, the anti inflamatory ingredient in Advil has the formula C13H18O2 A) How many molecules…

A: We have to predict the molecules  , number of H atoms, mole of ibuprofen, mass of ibuprofen.

Q: exothermic processes?

A:

Q: A certain reaction has the following general form:C4H8-2C2H4 At a particular temperature and [C4H8]0…

A: The order of a reaction can be determined by the graph plotted between concentration and time. Based…

Q: 18. When heated in water, which of the following will decarboxylate most readily? A) B) N(CH3)2 Он О…

A: b-Keto acids with a keto group in the b-position readily decarboxylate at room temperature in water.…

Q: A graduated cylinder was filled with water to the 17.2 mL mark and weighed on a balance. Its mass…

A:

Q: Draw the reaction between Anthrone reagent and glucose.

A:

Q: 29. Which of the following correctly descrlbes the flow of electrons for the reaction in the box? 1.…

A: We have given a reaction and we need to show the correct arrow flow of electrons from the given…

Q: 15.64 mol of gas is in a cylinder fitted with a piston. the gas has molar heat capacity of 21.45 J…

A:

Q: A student does an experiment to figure out the temperature inside of his refrigerator. He…

A:

Q: is a chemical reaction and a chemical change the same

A:

Q: 4. Comment how the concentration affects the rate. a. Concentration definitely has an affect on the…

A: Factors affecting rate of reaction

Q: What is the pH of a solution of 0.400 M CH,NH, containing 0.100 M CH,NH,l? (Kb of CH;NH, is 4.4 x…

A: This is a basic buffer solution. A buffer resist the change in PH of the solution.

Q: A solution is prepared by dissolving 15.0 g of NH3 in 250.0 g of water. If The density of the…

A:

Q: particle is emitted

A:

Q: Which of the following frequencies corresponds to light with the longest wavelength? O 2.00 x 10* 14…

A:

Q: An enzyme catalyzes a reaction with a Km of 5.00 mM and a Vmat of 2.25 mMs. Calculate the reaction…

A:

Q: Part B: Molar Solubility of Ca(OH)2 in presence of Ca" Temperature of the Experiment:24.6°C…

A: 4.) Volume of HCl added can be calculated using formula :  Volume of HCl added = Final buret reading…

Q: Part B: Molar Solubility of Ca(OH): in presence of Ca?+ Temperature of the Experiment:24.6°C…

A:

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.