Radioactive decay is typically second order.

Q: ich of the following is usually considered to be a weak acid? A) HCI B) HBr C) HI D) HF CH 26. Which…

A: (25) Given acids are  HCl, HBr, HI, HF    Among these acids HF is considered as a weak acid because…

Q: What is the ratio of conjugate base to undissociated acid for a weak acid with a pk, of 4.4 at a pH…

A: Given :  pKa = 4.4  pH = 9  To determine :  Ratio of conjugate base to weak acid

Q: Most chemistry laboratories have balances that can weigh to the nearest milligram. Would it be…

A: Given,  Molecules of C18 H38 = 5.88E+18 molecules The mass of C18 H38 is:

Q: spray can is used until it is empty except for the propellant gas, which has a pressure of 1344 torr…

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Q: The enthalpy of sublimation (direct conversion from solid to gas) of carbon dioxide is 26.1 kJ/mol.…

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Q: 46. Which of the following involves a decrease in entropy? A) the sublimation of solid CO2 into CO2…

A: The correct answer about entropy is given below

Q: CaCO3(s) + 2HCl(aq) --> CO2 (g) + H2O (l) + CaCl2 (aq) What is the molarity of a HCl solution if…

A: The molarity of the solution is defined as the ratio of no of moles of solute to that of volume of…

Q: The reaction shown below has an equilibrium constant value of Kc=0.580 at a certain temperature. H₂…

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Q: Dry ice, solid CO2 (s), can be made by allowing pressurized CO2 (g) to expand rapidly. If 36% of the…

A: Given data:                                  Volume (V) = 6.8 ft3…

Q: Question 2 At 25 Ca solution has a hydroxide-ion concentration of 7.47 x 10 M. What is its…

A: You have asked multiple type questions, we will solve only first  questions for you. If you want any…

Q: J l (NaCIy 0.2 N.u J 250 Na = 23. Cl = 35.5)s Q1 :- prepare a standard solution of a Sodium Chloride…

A: Detail calculation is shown below

Q: A 23.6g sample of an unknown gas occupies a volume of 12.0 L at standard temperature and pressure.…

A: Given, Mass of sample = 23.6 g Volume = 12.0 L molecular mass of gas = ?

Q: Learning Task 1.2. Why Oh Why? Kinetic Molecular Theory Using the statements in the Kinetic…

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Q: Which element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁵?

A: Total number of electrons =( 2+2+6+2+6+2+5 )  = 25 We know that, Atomic number = number of protons…

Q: Identify the functional groups circed in the molecules below. HO, H-N NH2 7. но Blank # 1 Blank # 2…

A: Different functional groups are: Aldehyde group  (R-CHO) Carboxylic group (R-COOH) Ether (R-O-R')…

Q: 24. A solution is saturated with CaF, in a pH 5.00 buffer. Which is the correct mass balance…

A: Here we have to write the mass balance equation for saturated solution of CaF2 in in pH=5 in a…

Q: 45. If a chemical reaction has a positive change in entropy, AS, then: A) the reaction is…

A: As it is a multiple question and no specific question is asked to answer so i am solving first…

Q: The only stable isotope of iodine is iodine-127. Predict the mode of decay of iodine- 125. Write the…

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Q: In a diesel engine the fuel is ignited when it is injected into hot compressed air, heated by the…

A: The final temperature of air (in K and °C) just before the injection of fuel in a cylindrical…

Q: For each reaction, calculate AHn, ASn , and AGn at 25 °C and state whether or not rxn rxn the…

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Q: Consider the following compound, whose protons are highlighted as a-d. На На На Hc Hd Hb The…

A: The correct answer about 1H NMR spectrum is given below

Q: What is the pH of a 0.173 M solution of a hydrogen sulfide? The pKa at the temperature of the…

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Q: Encircle the chiral center/s in each molecule. Assign R or S configurations for each chiral center.…

A: According to CIP rule in terms of R/S designation , clock wise rotation with lower priority group in…

Q: O4 and the formation of the brown precipitate manganese dioxide, MnO2. OH + 2KMNO4 + 4H2O + 2MNO2 +…

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Q: Homework Q1 :- What is the pK, of acetic acid, if K, for acetic acid is 1.58 x 10-6?

A: Pka is equal to negative logarithm of ka

Q: -prepare 0.7% potassium Chloride (KCI) in 0.3 liter ?

A: Given :- concentration of KCl solution = 0.7%  Volume of solution = 0.3 L  To describe :-  Its…

Q: If 1.50 mL of a stock solution of 12.0 M HCl is diluted to 25.0 mL, what is the new concentration?

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Q: uestio 16 Which one of the following 1.0 M solutions would be expected to have the highest pH? A)…

A: Bases have the high PH and acids have low PH. So , here we need to  compare only two bases that is…

Q: hd See Periodic Table See Hint Calculate the pH of 1.25×10M solution of selenocysteine (pK,1 = 2.21.…

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Q: In addition to C-14, K-40 is often used for archeological dating. K-40 decays to Ar- 40 by positron…

A: This follow first order kinetics,so we need to determine rate const first.

Q: 20.77. The nitration of methanol, CH3OH, by nitrous acid is thought to proceed via the following…

A: Rate law expression: Rate laws or rate equations for a reaction are mathematical expressions which…

Q: A stimulus causes an electrical signal to move along a nerve due to: Change of positive ions into…

A: Biochemistry is branch of chemistry which is applied to  study the biological processes at the…

Q: What is the percent yield of CO2 if the reaction of 10.0 grams of CO with excess O2 produces 12.8…

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Q: Choose a Grignard reagent _______and a ketone _______ that can be used to produce the following…

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Q: (c) The hydrocarbon C17H36 is found in the gas oil fraction obtained by fractional distillation of…

A: Introduction :  Crude oil is a naturally occurring, yellow-to-black liquid found in geological…

Q: What gas is produced when you mix an acid like hydrochloric acid down a drain that already has high…

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Q: Chlorine has two abundant isotopes, Chlorine-35 and Chlorine-37. How many protons and neutrons are…

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Q: Acetylene gas, C2H2, burns in oxygen emitting high temperatures used for welding metals. How many…

A: Detail mathematical calculation is shown below

Q: A 1.22 gram sample of an unknown gas is found to occupy a volume of 1.13 L at a pressure of 441 mmHg…

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Q: 11. What volume of hydrogen gas at STP may be prepared by the reaction of 4.54 g of gallium with…

A: Given, Ga(s) + HCl(aq) ➝ GaCl3 + H2 Mass of Ga reacts = 4.54 g Molarity of HCl solution = 1.75 M =…

Q: Compare the solubility of lead chromate in each of the following aqueous solutions: Clear All 0.10 M…

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Q: priya bought a solid chocolate bar and left it in her pocket.  Whe she took it out the chocolate was…

A: The answer is attached below

Q: Check the box next to each molecule on the right that has the shape of the model m molecules model…

A: Concept:  The given model has a linear shape and now we will apply VSPER theory to determine the…

Q: alanced chemical equation corresponds to the pression? PROBr Po Per, Кр -) = 2 NO (g) + Br2(g) %3D

A: Equilibrium can be defined as a state of reaction in which rate of forward reaction become equal to…

Q: From the scheme below, draw the structures of X and Y. These two compounds are the major products of…

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Q: ydrogen gas is produced according to the following balanced reaction.   ​Mg   +   2HCl   --->…

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Q: 6. а). 1. CF4 2. Н:0 3. CH:ОН 4. HCI 5. CH14 Circle all the molecules below that are immiscible with…

A: 6) CCl4 that is carbon tetrachloride is nonpolar because all the four bonds are symmetrical, and…

Q: Copper commonly occurs as the sulfide mineral CuS . The first step in extracting copper from CuS is…

A: In balancing of redox reaction total electrons gained by oxidising agent is equal to total electrons…

Q: 43. BaF2 is very slightly soluble in water with a Ksp = 2.4 X 105. Which of the following statements…

A: We are authorised to solve only one question at a time. Please post rest of the questions…

Q: Calculate the pH at 25 °C of a 0.12M solution of pyridinium chloride (C,H, NHCL). Note that pyridine…

A: We can calculate the  POH of weak base using the relation. POH =  1/2( PKb -logC) From POH we can…