What does presenter say about the relationship between the number of valence electrons of the main-group element and the group number of that element (except helium)?

Q: 18mL 0.10MHClO(Ka = 3.5 * 10 ^ 8) was titrated with 0.06 M NaOH. Calculate the pH after the addition…

A: Given data Volume of HClO acid = 18 mL Acid dissociation constant Ka=3.5×10-8 molarity or…

Q: Draw the neutral organic product when butanone reacts with one equivalent of ethanol in acidic…

A: Butanone + CH3CH2OH/HCl --->

Q: .) Which of the following processes are spontaneous and which are nonspontaneous: (a) the ripening…

A: The following processes are spontaneous, and which are (a) the ripening of a banana, (b)…

Q: A galvanic cell has a silver electrode in contact with 0.056 MM AGNO3A9NO3 and a copper electrode in…

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Q: The conjugate base of a weak acid is   Question 3 options:   A)  a strong base.    B)  a strong…

A: The conjugate base of weak acid depends on the stability of the conjugate base.

Q: 2. For the reaction 7A + 13 B + 15C → 17P - If 15 moles of A, 26 mole of B and 30.5 moles of C are…

A: Recall the reaction, 7A + 13B + 15C -----> 17P moles of A=15 moles moles of B=26 moles moles of…

Q: 3. (1) The overall range for carbon chemical shifts are 0- 220 ppm. Where in "chemical shift" ranges…

A: The chemical Shift range of C-13 NMR is given below

Q: Arrange the following material according to the increasing tendency to lose an electron. (I.) glass,…

A: Here we have to write the increasing tendency to lose elctrons in the following materials.

Q: A critical reaction in the production of energy to do work or drive chemical reactions in biological…

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Q: Consider the galvanic cell described by the following shorthand: Fe2* || Ag* | Ag. Select all true…

A: 1) for the given galvanic cell, Fe|Fe2+ || Ag+|Ag A) Iron metal is being oxidised to iron(III)

Q: Complete the following reactions by providing the missing product(s). Determine what mechanism…

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Q: Question 4 What reagent is needed for the following transformation? O A Na in NH3(), at low…

A: Alkyne can be reduced into alkene and alkane by using some specific reagent

Q: , (What is the weight needed to prepare (2 litters) of (0.1)N of calcium carbonate (CaC03 40, C= 12,…

A: Given:: Normality of CaCO3 = 0.1 N molar mass of CaCO3 = 100 g mol-1 Volume= 2 L weight of CaCO3= ?

Q: Compute for the heat of solution of MgSO4. The unit must be in kJ/mol.

A: Ans. When anhydrous MgSO4 dissolves in water, the resulting ions Mg2+(aq) and SO42-(aq), are…

Q: In the reaction: 2 C2H6(g) + 7 O2(g) -> 4 CO2(g) + 6 H2O(g), increasing the concentration of C2H6(g)…

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Q: ¿Cuál es la concentración de OH a 25°C para una solución con pOH= 6.40 ? Select one: O 7.60 O 8.60 O…

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Q: QUESTION 1 For the molecule PF3 the electron group arrangement is tetrahedral A and the molecular…

A: VSEPR theory: The structure of a molecule can be determined by using the VSEPR theory. According to…

Q: proposed mechanisms has a rate law that is consistent with the observed rate law. Reaction: H2+Br2…

A: From the given steps, As we know slow step is rate determining step,  So, Rate = k2 [H][Br2]…

Q: End point can be measured using .A Electrical conductivity .B Intensity of electric current .c…

A: In the titration the endpoint of a reaction is the point where some visible changes show the…

Q: . Place a cup of water in a beaker or a pan. Then heat it using a hot plate or stove. Place a…

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

Q: is true of false? (a) The second law of thermodynamics says that entropy is conserved. (b) If the…

A: a) According to second law of thermodynamics, entropy of univese is always increasing.  So, it is…

Q: To determine the minimum ratio of extraction solvent to feed solvent, one has to know: a. the…

A: simplest liquid-liquid extraction involves only a ternary (i.e. 3 components) system. The solution…

Q: Number of molecules in 4x10-6 mol CH3CH2OH. Express your answer using four significant figures. nν…

A: Here we have to determine the number of ethanol molecules present in 4×10^-6 mol of ethanol and…

Q: (4) From the data given below calculate AG200 and hence comment on the feasibility of use of…

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Q: Question: Calcium Fluoride is added to water until the solution is saturated. The fluoride ion…

A: Equilibrium constants can be represented as  Ksp = ( Ca2+) ( F-)2 The detail description is as…

Q: (4) From the data given below calculate AGT200 and hence comment on the feasibility of use of…

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Q: The preparations of two aqueous solutions are described in the table below. For each solution, write…

A: The first question is a simple acid and base reaction. It results in the formation of conjugate acid…

Q: Which of the following steps should be followed when performing kinetics experiments? Choose all…

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Q: 1. KH, THF, 23 °C 2. H30* workup Br

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Q: (4113011 5. A monoprotic acid (HA) with K, of 8.76 x 10 has a partition coefficient of 3.9 (favoring…

A: 5#(a): The organic solvent used for extraction is octanol.  Given the partition coefficient, P = 3.9…

Q: What is the half reaction for silver? (* Solve for the overall reaction of the galvanic cell If the…

A: According to IUPAC notation Galvanic cell is represented as  Anode // Cathode  // indicates salt…

Q: formula mass MgBr2.

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Q: Which of the following steps should be followed when performing kinetics experiments? Choose all…

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Q: Question: Determine the Molar Concentration of Diazepam, if its pH=8.56, and has a pKa of 3.0

A: Given, pH = 8.56 pKa = 3.0 pH greater than 7 implies that it is a basic solution. So, we will…

Q: Xylitol, which is used as a sugar substitute, is produced by the reduction of D-xylose. Modify the…

A: The conversion of the aldehyde group (-CHO) to alcohol (-CH2OH) is the reduction reaction. In this…

Q: (4) From the data given below calculate AG0 and hence comment on the feasibility of use of hydrogen…

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Q: DATE. EXI4 the rate constant of zero order reactiok is 08mat cim' whaet wih be the itial Cancentra…

A: Integrated rate equation for zero order reaction is,    [A]t = -kt  + [A]0     [A]0 = Initial…

Q: What effect would you expect the following changes to have on the rate of the Sy2 reaction of…

A: Here we are required to predict the effect on the rate of reaction when the concentration are varied…

Q: A sample of an ideal gas has a volume of 2.22 L at 282 K and 1.06 atm. Calculate the pressure when…

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Q: Which ion is aromatic? А. С. D. O A. OC. OD. B. B.

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Q: pose all that apply, partial poșițiyfps. enzyme concentration is kept constant for all reactions the…

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Q: (i) Label the regions 1,2 and 3 in the ATP molecule given below as Phosphate, Base and Ribose (ii)…

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Q: CHŞLI 'N' CI „NH2 +. CH;CH,CH,Br + CH&Ñ=N

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Q: Name the three alkenes using systematic names. H3C CH3 A. H3C The name of compound A is: CH2 B. CH3…

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Q: When 0.576 g of biphenyl (C12 H10) undergoes combustion in a bomb calorimeter, the temperature rises…

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Q: Balance the following skeleton ionic reaction, and calculate E°cell to decide whether the reaction…

A: First we would write half reactions and balance electrons . Then we would add those half reactions…

Q: A solution is prepared by adding 0.10 mole of Ni(NH, ),Cl, to 0.50 Lof 3.4 M NH, Calculate Ni…

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Q: HCI он C,H,O Na,Cr,O, C,H,CI Compound A H20 Compound B C,H,O Compound C

A: When Cyclopentadiene is treated with HCl, HCl will add to one of its double bond giving compound A.…

Q: 1. Draw a schematic diagram of a solution containing the following. Al, Cr and Zn

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

Q: A voltaic cell based on the reaction between vanadium(III) and nitrate ions has E'cell = 0.62 V:…

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