Given the standard enthalpy changes for the following two reactions: (1) 4C(s) + 5H₂(9) C4H10(g) AH° = -125.6 kJ (2) C₂H4(9)2C(s) + 2H2(g) ΔΗ° = -52.3 kJ what is the standard enthalpy change for the reaction: (3) 2C₂H4(g) + H₂(g) C4H10 (9) kJ ΔΗ° = ?

Q: Which of the following is true of charge? Choose all that apply Charges are always attracted to each…

A: Given question about characteristics of charges . Here given many characteristics about the charges…

Q: Design a synthesis of acetophenone from benzyl alcohol and methanol. Part 1 out of 12 Choose the…

A:

Q: Determine the number of significant figures in the answers to these math problems: 9,382.65 + 60.152…

A: There are some rules for finding total no. of significant figures: 1) All non zero numbers are…

Q: How many of the following are cis isomers? CHS 00000 12345 05 CH3 CH₂ CH 3 CI Cl CH3 CH3

A:

Q: What would the pH be after addition of 15.05 mL of 0.1000 M HCI to 25.00 mL of 0.1000 B (a weak…

A: we have to calculate the pH of solution

Q: What is the freezing point of a solution consisting of 0.500 moles glucose added to 295 g of water?…

A:

Q: What is the strongest intermolecular force present between molecules of the compound shown below? A.…

A: Intermolecular forces are attractive or repulsive force acts between neighbouring molecules, atoms…

Q: A 50:50 mixture containing the compounds below is expected to be optically inactive. !!!!!IC/ OH CI…

A: Optical activity refers to a property of a compound or mixture to rotate plane polarized light to…

Q: Increasing the pressure on the following reaction will increase which of the chemicals present in…

A: Here we are required to find the effect of the pressure on equilibrium reaction

Q: a. Calculate the pH in the titration of 50.0 mL 0.03200 M chloroacetic acid (Ka = 1.36 x 10 ¹) after…

A: Given :-  Volume of Chloroacetic acid, ClCH2COOH = 50.0 mL  Molarity of Chloroacetic acid, ClCH2COOH…

Q: Choose the best reagent (A-E) for carrying out the following conversion from the list provided…

A:

Q: calculate freezing point of 0.40 m NaCl solution. Make sure to write the dissociation equation.

A: Colligative properties: The colligative properties are those properties of solutions that depend on…

Q: A simple cubic cell contains one metal atom with a metallic radius of 100 pm. a. Determine the…

A: Radius of atom R = 100 pm = 100 * 10-12  m = 10-10 m    Note : As per guidelines we are answering…

Q: What is the A Gº for the following reaction from the equilibrium constant at the temperature given?…

A:

Q: How many moles are in 1.46 kilograms of sulfur? A. 45.5 B. .0455 C. .0910 D. 91.0

A:

Q: Which of the acids listed below has the weakest conjugate base? O H₂02; K₂ = 2.400x10-12 O HBr, K₂=…

A: The larger the value of ka stronger the acid and weaker the conjugate base.

Q: You are going to be thrilled to know that the amino acid cysteine has the formula What mass of…

A: Solution  Correct option is A) 13.4 g

Q: Use the oxidation numbers to determine which element is oxidised or reduced in the following…

A:

Q: 1. Which of the following statements regarding the purification of organic compounds is TRUE? a.…

A: Recrystallization: In this method of purification,a solid is dissolved it in a hot solvent and then…

Q: Question 25 Characterize the bond that forms between N (3.0) and F (4.0). ionic bond polar covalent…

A: The covalent bond is formed by the sharing of electrons between the atoms.

Q: Based on its 13C NMR spectrum, how many types of carbon (i.e., sets of equivalent carbons) are there…

A:

Q: It takes 15.5 mL of a 0.40 M HCI solution to neutralize 300 mL of KOH solution. What is the…

A:

Q: How many cubic meters (m³) are in 288 liters (L)? Round to the correct number of significant…

A:

Q: Olivia developed a new dye called Dye C. It was analyzed against other dyes using paper…

A:

Q: Aqueous hydrobromic acid (HBr) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium…

A: Given, The balanced equation: HBr(aq) + NaOH(aq) → NaBr(aq) + H2O(l)  The mass of HBr = 42.9 g.  The…

Q: Which solution has the higher pH?

A:

Q: Lulu Labwrecker carefully pipets 25.0 mL of 0.509 M NaOH into a test tube. She places the test tube…

A:

Q: Choose the best reagent (A-E) for carrying out the following conversion from the list provided below…

A: The given organic transformation is  Identify the best organic reagent for the above…

Q: Calculate the pOH of the following solutions at 25 degrees Celsius.   c. [H+] = 12 M d. [H+] = 5.4 x…

A:

Q: Calculate the pH of each of the following buffered solutions a. 0.10M acetic acid/0.25M sodium…

A: To solve this question, we will make use of Henderson Hasselbach equation which relates the pH to…

Q: For each of the species below, identify any cyclic conjugated system, then: A. Determine the number…

A: If a cyclic , planner molecules has 4n+2 π electron it is considered as aromatic compounds. If a…

Q: For the following pairs of redox processes given, work out the oxidation numbers for the reactions…

A: Balancing of these redox reaction is given by:

Q: If 50 ml of 1.00 M of H₂SQ and 50 ml of 2.0 M KOH are mixed what is the concentration of the…

A:

Q: The electrolysis of an aqueous solution of NaCl has the over all equation: During the electrolysis…

A: We need to find yield of H2 and Cl2 in this process.

Q: Electrophilic nitration of benzoic acid gives almost exclusively 3-nitrobenzoic acid. By drawing the…

A: benzoic acid undergoes electrophilic substitution reaction when reacted with Nitration mixture(1:1…

Q: Give IUPAC names to the following compounds: а. нс. H₂C-N нс нс НС нс HO CH₂ -CH3 NH₂ NO₂ .CH3 НС НС…

A:

Q: Liquid hexane （CH3 （CH3）4（CH3）） reacts with gaseous oxygen gas （O2）to produce gaseous carbon dioxide…

A:

Q: Mass of Aluminum 3.08 g Density of Aluminum 2.70 g/cm3 Volume of Aluminum Foil 1.14 cm3 Thickness of…

A: Mass of Al=3.08 gDensity of Al=2.70 gcm-3Volume of Al foil=1.14 cm3Thickness of Al…

Q: What is the I.U.P.A.C. name of the following compound? CH₂CH3 CH₂CHCH₂CH₂ 2-ethylbutane…

A: Rules for nomenclature of alkanes-  Select and name the longest continuous carbon chain Identify…

Q: If the electron affinity for an element is a negative number does it mean that the anion of the…

A: •ELECTRON AFFINITY:-Electron affinity is the energy change when an electron is added to gaseous…

Q: O O

A: Baeyer test and Bromine in sunlight test are used to detect the presence of carbon-carbon double…

Q: Explain the main properties of polymers that make them desirable  for many applications

A: Polymers are macromolecules formed by the covalent bonding of monomer units. Polymers are very…

Q: Calculate the pH of each of the following buffered solutions a. 0.10M acetic acid/0.25M sodium…

A:

Q: A student weighs out 0.213 g MgCl2·H2O (Mw = 131.235 g mol-1) of and 0.167 g of NaOH (Mw = 39.997 g…

A: Since, given molar mass of MgCl2·H2O is 131.235 g mol-1 . But it does not match with formula. Hence,…

Q: your laboratory notebook, write an outline of the experimental procedure. Remember to include your…

A: As we know that Moles = Given mass /  molecular mass  Density = Mass/ volume

Q: Give the IUPAC name for the products of the following beta-elimination reaction. Br + NaOCH3 CH₂OH >

A: Here we will draw possible products of beta-elimination.

Q: When the following equation is balanced properly under basic conditions, what are the coefficients…

A: we have to balance the given reaction and fill the boxes

Q: (A) (B) SiO3²-or SO3²-

A:

Q: organic chem(usf)- line angle formula for (R)-1-methyl-5-chlorocyclopenta-1,3-diene.

A:

Q: Aqueous sulfuric acid (H2SO4) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium…

A: Given, H2SO4(aq) + NaOH(s) → Na2SO4(aq) + H2O(l) Balancing the above equation, we get H2SO4(aq) +…