Which of the following involves a chemical change? boiling water melting ice chopping wood cooking an egg none of these

Q: The rate constant for the reaction shown below is 2.60 x 10 M when the reaction is carried out at…

A: Given : K1 = 2.60 x 10-8 M-1sec-1  T1 = 300K Ea,1 = 9.8KJ.mol-1

Q: Below is a primary alcohol or and an aldehyde (of same carbon length). Which is more likely to be…

A: The solubility in water depends on the intermolecular interaction among the water molecules with…

Q: A compound contained 4.6g Na, 2.8g N, 9.6g O. Find the empirical formula. (RAM data Na = 22.99, N =…

A: In empirical formula problem first we determine mole ratio of given atom

Q: Give the reason of the following statements: 1. An achiral starting material in enolate alkylation…

A: Wagner-Meerwein rearrangement is basically the shifting of the alkyl ion of H+ ion to form the most…

Q: Determine the relative atomic mass of chlorine if (with RAM 34.969) and (with RAM 36.966) have…

A: Atomic mass of Cl-35 = 34.969  Percentage abundance of Cl-35 = 75.5%  Atomic mass of Cl-37 = 36.966…

Q: Calculate the total energy needed to convert 200 grams of ice at -5 to water vapor at 100 degrees…

A: Given data Initial Temperature of ICE : T1=-5°C Final Temperature of steam : T2=100 °C mass of ice :…

Q: Listen Which of the following ions does not have a -1 charge? a) nitrite b) nitrate O c) acetate d)…

A: In an atom, there is nucleus at the centre and electrons are revolving around it. Electrons are…

Q: Which of the following is most likely an intermediate in the following reaction?

A: As concentrated sulfuric acid is a strong oxidizing agent, it oxidizes some of the alcohol to carbon…

Q: Consider an ideal diatomic gas in a piston, at T = 22.7°C and atmospheric pressure (1.01 x 105 Pa)…

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Q: 36. Each of the following reactions can undergo substitution. PART 1: Label each reaction as a SN2…

A: Concepts 1) Secondary halides on reaction with nucleophiles leads to form Sn2 product.  2) Tertiary…

Q: 1.8 ) Liquid H2O is found to have a smaller molar volume (molar volume is = given in cubic…

A: Given that, the molar volume of liquid H2O is less than D2O. This is because, H2O is capable of…

Q: Part B A mole of X reacts at a constant pressure of 43.6 bar via the reaction X(g) +4Y(g)→2Z(g), AH®…

A: Part A  Total energy of the system at constant pressure depends upon the heat absorbed by the system…

Q: 0% 25% 50% 75% 100% Depth of H2O2 Solution (d) 2.1 cm 2.1 cm 2.1 cm 2.1 cm 2.1 cm Trial 1 Time 180…

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Q: Reagent 1 & 2 in the following synthesis are Br ÇI 2 NH O C) 1)- HBr, peroxide; 2)- methylamine O B)…

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: A diatomic molecule is modeled as a Morse oscillator, and one finds that its energy level…

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Q: 85 mL of 7 M C21H23NO5 contains how many moles of carbon? Your answer should have two decimal…

A: Given: Concentration of C21H23NO5 = 7 M Volume of solution = 85 mL = 0.085 L…

Q: 1. Which is the pH of 1M NAOH solution? 2. Which is the pH of 1M HCI solution? 3. Which is the pH of…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: After measuring the cortisol level in 30 students (see problem 1a) it is average cortisol levels…

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Q: 3x < 3 or 4x + 6 < -3 and write the solution in 4 Solve interval notation.

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Q: Solve: ) -5) 6.00 x 10 x (8.00 x 10 8.00 x 10 x (681)

A: Mathematical tools are the tools which can simplify the complex equations and calculations. Simple…

Q: Each dimensional analysis problem takes you 1.5 minutes to complete. How many-dimensional analysis…

A: The time taken for analysis of one-dimensional analysis is = 1.5 min Total time is = 6 weeks (242…

Q: QUESTION 13 Identify the acid, base, conjugate acid and conjugate base in the following reation:…

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Q: . Predict the sign of AS for each of the following reactions. a. N2(g) + 3 H,(g) → 2 NH3(g) b.…

A: The reactions given are,

Q: 1. What mass, in g, of LICN (mM = 32.959 g/mol) needs to be added to 278.9 ml of 0.0415 M HCN to…

A: Given: Concentration of HCN = 0.0415 M Volume of HCN solution = 278.9 mL = 0.2789 L…

Q: A dilute solution of 6-phenylhexanoylchloride in CS, (carbon disulfide, a solvent) was added slowly…

A: Friedel Craft reaction is an electrophilic substitution reaction. It may have alkyl halide (in…

Q: Draw the Lewis Structures for each of the species below, then state the molecular arrangement and…

A: Given compounds: PBr3 IF4- NO3- We have to draw the Lewis structures and state the molecular…

Q: : Questions [References] Calculate the pH of an aqueous solution of 0.411 M ethylamine (a weak base…

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Q: Year pre 1970 Av mass (g) 1969 3.0878 1970 3.06666 1971 1972 1973 1974 3.06580 1975 3.09966 1976…

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Q: (ksp) The soubiliy of caicium phosphare, CA3(POe, IS 7.1 x 10-7 mole Ines What are the molar…

A: Given, [Ca3(PO4)2] = 7.1×10-7 M  Calculate concentration of its ions ?

Q: A cube of metal is 3.12 cm along edge.  The volume of this cube is [a] cm3  .

A: We can calculate the volume of the cube by doing height multiplied by width multiplied by depth.…

Q: (i) Differentiate between the mass flow and funnel flow patterns of powder flow in a hopper during…

A: In bulk solid storage discussions, the terms hopper, bin, and silo are often used interchangeably.…

Q: What is the product (s) of the following Reaction? H2 Rh (PPH3),CI B A O D&E O C&E O A&B C&D .....…

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Q: How many seconds are in 24 h?

A: Seconds, Minutes, and Hours all are the units of time. 1 hour = 60 minutes. 1 minutes = 60 seconds.

Q: A sample of charcoal analyzed in 1995 had an activity of "C = 7.45 dpm g. a. Calculate the age of…

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Q: 51 Caffeine Caffeine, found in coffee, tea, chocolate, cola beverages is a highly popular stimulant…

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Q: QUESTION 8 How many grams of KCI do you need to make 450ml of a 0.5M Tris, 500mM KCI 10x stock…

A: It is required to find: (8)  grams of KCl needed to make 450ml of a 0.5M Tris, 500mMKCl10x stock…