The point where the indicator actually changes color is called the. . of the titration. 1. start point 2. middle point 3. end point 4. zero point а. 1 O b. 2 с. 3 O d. 4

Q: Q) If Vrolu ene 25ml and Voit 25m l %3D Viwater ooml m wt find wt :9 6.

A: Since, NaOH  is a mono acidic base Equivalent weight of NaOH = molecular weight = 40 g / mole Now ,…

Q: What is the energy you calculated that corresponds with the YELLOW color in the NEON atom emission?…

A: Formula used for calculating energy:  E = hv  Or  E = hc/λ  Where  E = energy  h = plank constant  v…

Q: 1. O3 2. Zn, HOAC %3.

A:

Q: 11. Which element has the largest atomic rądiys? a) Kor Li b) Zr or Cs or Sb or S 12. Which element…

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A: A molecular solid consists of discrete molecule. Vander-waal forces, dipole-dipole forces and London…

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A:

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: %24 ALEKS - Jonnel Chippy - Learn…

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Q: give an explanation of the semi-empirical mass formula

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Q: What is the major product of the following reaction? Br2, -78°C

A: Conjugated diene gives a bromination reaction with bromine to form a dibromo product by the…

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A: Given: Bone fragment have lost 87.1 % of their original carbon-14 content. half-life of C-14 =5730…

Q: Heavy nuclides with too few neutrons to be in the band (zone) of stability are most likely to decay…

A: The correct answer about the stability of Heavy nuclides is given below

Q: 9. A chemist is conducting an experiment in which 500 grams of C12H22011 must be dissolved in 1liter…

A: We have to dissolve 500 gm C12H22O11 into 1 lit water.

Q: What is the energy (in kJ) of one mole of photons associated with radiaition that has a frequency of…

A:

Q: ce Ke

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Q: The Claisen condensation converts two molecules of an ester into a B-keto ester. The reaction starts…

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Q: o electron affinity.

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

A:

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: The maximum allowed concentration of chloride in a municipal drinking water supply is 102 ppm Cl–.…

A: Given: Concentration of Cl- in water = 102 ppm Molar mass of Cl- = 35.45 g/mol

Q: Derive the ionization fraction, az, where (HPO;-), in terms of and the acidity constants, Ka1, Kaz,…

A:

Q: What are the units of the retention factor (Rf)? Briefly explain your conclusion.

A: The correct answer about Retention factor is given below

Q: Substance AHf (kJ/mol) KCIO3(s) -397.7 KCI(s) -436.5 What quantity of heat is released when 1.00 g…

A:

Q: What is the entropy change when 0.17 moles of CHCI, vaporizes at 61.0 °C? [AH(vap) = 29.6 kJ/mol at…

A: When a liquid changes into the gas at its boiling point the entropy of the system increases.

Q: HCN is a weak acid (Ka = 6.20 x 10-10), so the salt, KCN, acts as a weak base. What is the pH of a…

A:

Q: When 1 mole of methane (CH4) is burned at constant pressure, 890 kJ of energy is released as heat.…

A: Given, When 1 mole of methane (CH4) is burned at constant pressure, 890 kJ of energy is released as…

Q: Calculate the pH at 25 °C of a 0.99M solution of potassium cyanide (KCN). Note that hydrocyanic acid…

A:

Q: A double bond between two carbon atoms in a molecule that contains fatty acids would cause the…

A: When the double bond present in the fatty acid then fatty acid is called unsaturated fatty acid.…

Q: a. tor each pair, State and explain which is mote basic : (t) (r) b. tor each pair Enantiomer,…

A:

Q: How is a total cholesterol test different from an HDL test? How is a total cholesterol test…

A: (2) The difference between TOTEL HDL and LDL Cholesterol Cholesterol is a fatty substance that…

Q: * Which reaction is an example of a precipitation reaction? (A) H2CO3(a) - H20) + co (B) H2SO4a) +…

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please…

Q: The volume of 0.65 mol of an ideal gas at 365 torr and 97 °C in liters will be

A: Given :  No.of moles of an ideal gas = 0.65 mol  Temperature = 97oC  Pressure = 365 torr  To…

Q: moles of F2

A:

Q: ZnO(s) Zn(1) + O2 (g) Express your answer as a chemical equation. Identify all of the phases in your…

A: Given :-  ZnO(s) + ∆ → Zn(l) + O2(g)  To balance :-  Given equation

Q: The enthalpy of reaction, AHrxn, for this reaction is-3918.4 KJ. Calculate the bond strength of the…

A: Given : combustion of cyclopropane

Q: Consider the titration of formic acid, HCHO, with barium hydroxide. (a) Write a balanced net ionic…

A: Given: Titration of HCOOH with Ba(OH)2.

Q: Determine the pH change when 0.086 mol NaOH is added to 1.00 L of a buffer solution that is 0.427 M…

A: First we would Calculate pH before addition of NaOH using Henderson Hasselbalch equation.  Then to…

Q: An electric current of 350.0 mA flows for 630. milliseconds. Calculate the amount of electric charge…

A: Given: The amount of current = 350.0 mA Time = 630 milliseconds We have to calculate the amount of…

Q: Commercial agriculture can often lead to water-quality problems. In one to two sentences, explain…

A: Agriculture, which accounts for 70% of global water withdrawal, plays an important role in water…

Q: Construct a titration curve by reacting a 50.00mL aliquot of NaCN 0.0500M with the 0.100M HCl…

A: we need to calculate pH of the solution after addition of given amount of HCl to NaCN solution

Q: 6. In Group C, do all four compounds appear to be molecular, ionic, or molecular acids? Based on…

A: Group 'C' means the 14th group element. In the 14th group carbon (C), silicon (Si), germanium (Ge),…

Q: spend a million dollars a day, how long would it take to spend one mole of dollars?

A: 1 million dollars = 106 dollars are spend in one day 1 mole dollars = 6.022×1023 dollars

Q: Calculate the standard change in Gibbs free energy, AG•rxn, for the given reaction at 25.0 °C.…

A: #Q.1: We have to find ∆Gorxn for the reaction below: NH4Cl(s)  <-----> NH4+(aq) + Cl-(aq) ;…

Q: A Br FeBr3 2 -Li then H30* D LIAIH4 then H3O* Propose reaction conditions (A) and draw the products…

A: The reaction schema given is,

Q: The following reactions all have K>1. 1) CH3CO0 (aq) + HF (aq) F (aq) + CH3COOH (aq) 2) CH3CO0 (aq)…

A: Bronsted -Lowery acid-base theory:  Bronsted acid: Proton donar is called Bronsted acid  Bronsted…

Q: Yeast is used in baking the morning bread of Filipinos known as "pandesal". Why?

A: Yeast is used for the leaving of bread. Yeast uses the sugars and oxygen dough to produce more yeast…

Q: Calculate the pH at 25 °C of a 0.64M solution of pyridinium chloride (C;H;NHCI). Note that pyridine…

A: The value of pKb for the given weak base is = 8.77 The concentration of the base solution is = 0.64…

Q: Substance AHf (kJ/mol) KCIO3(s) -397.7 KCI(s) -436.5 What quantity of heat is released when 1.00 g…

A: The reaction given is, => 2 KClO3 (s) → 2 KCl (s) + 3 O2 (g)  Given: ΔHof{KClO3 (s)} = -397.7…

Q: A voltaic cell is made using the two half-cells below (both written as reduction): Cl2(g) + 2e¯ 5…

A: The cell in which chemical energy is converted into electrical energy  is called Galvanic cell…