For each of the following pairs of substances, determine which has the larger molar entropy at 298 K:

(A) Cl2(g) or (B) Br2(l)

(C) Ni(s) or (D) Fe(s)

(E) C2H6(g) or (F) C2H4(g)

(G) CH4(g) or (H) CCl4(g)

(I) MgO(s) or (J) HgO(s)

(K) MgCl2(aq) or (L) NaCl(aq

1) Pretend you have just synthesized a novel, relatively non-polar compound that is solid at room temperature. The last reaction you performed on route to this compound also formed small quantities of more polar impurities. You are going to attempt to purify your novel compound by recrystallization. Would you rather try using ethanol or cyclohexane? Explain why.

2) When is it necessary to use a solvent-pair recrystallization?

Calculate the heat absorbed when 578 g of ice at −12.7°C melts and then the water is converted to steam at 205.0°C. The specific heat of ice is 2.03 J/(g°C),the heat of fusion of ice is 6.01 ×103 J/mol, the specific heat of water is 4.18 J/(g°C),the heat of vaporization of water is 4.07 × 104J/mol, and the specific heat of steam is 2.02 J/(g°C).

You have 6.56x10²² molecules of the vitamin C (384.7g/mol), what is the mass in grams? Show step by step work please

How many spherical nodes and planar (angular) nodes does a 2s orbital have?

how would you control the particle size in reverse micelle method?

1-conctruct trans-1,2-dimethylcyclohexane.by means of ring flips, examine the model with the two-CH3 groups axial and the two -CH3 groups equatorial (e,e=equatorial,equatorial a,a=axial, axial) wich is more stable conformation ? explain the answer.

Need part 2 of this

2-construct cis-1,2-dimethylcyclohexane by placing one-CH3 group axial and the other equatorial (a,e=axial, equatorial,e,a=equatorial,axial)Do rings flips and examine the 2 chair conformations. ( Explain wich is more stable)give the 2 isomers , trans-1-2-dimethylcyclohexane and cis-1,2-dimethycyclohexane, which is more stable isomers . Explain your answer.

An unknown nonelectrolyte and nonvolatile compound is dissolved in enough pure water to make 348ml of solution.The vapor pressure above the solution drops from 198.7mbar to 196.7mbar. When 100g of the compound is dissolved at constant temperature.Determine the molar mass of the unknown compound. Assume no change in volume occurs upon dissolution.

The answer is 509 g/mol Why?

Write an essay in the ethical dilemma of nanotechnology and how transhumanism/posthumanism are involved

Silver chromate is more soluble in solutions containing some (less than 1 M) potassium nitrate, even though neither potassium nor nitrate show up in the BCE for the dissolution reaction

Ag2CrO4 (s) ↔ 2 Ag+(aq) + CrO4 2-(aq)

The solubility product constant (which is not the same as the solubility!) for silver chromate is Ksp = 1.1 x 10-12 making it a pretty insoluble substance. Your job is to figure out the molar solubility in pure water, then the molar solubility in a 0.25 M KNO3 aqueous solution and finally to express the change as a percent difference. To make it easier (and faster) please use the Debye-Hückel limiting law: log γx = -0.510 Zx2 (µ)1/2 to obtain the required activity coefficients and make a simple assumption about the ionic strength of water – rather than solving for it in an iterative process.

The answers are provided. Please provide an explanation/machanism to support the answers. Questions 1, 3, 13, 14, 19, 21, 25, 27, 30, 32, 33, 34, 37, 38, 39, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 61, 62, 63 and 65. (I know it's a lot, but please do as many as you are willing to. Thank you!

Here is the link to the document: http://www.kau.edu.sa/Files/0008904/files/41686_g.pdf

How many liters of 0.829 M LiOH will be needed to raise the pH of 0.327 L of 5.11 M ascorbic acid (H₂C₆H₆O₆) to a pH of 11.36?

Discuss the kinetics of biodegradation of pollutants in subsurface environments.

What is the pH of a solution where the [OH^- ] =1.52 x 10^-13 M?

What is the molarity of the OH^- ions in 0.040 M barium hydroxide, Ba(OH)₂?

Assume the barium hydroxide is fully dissociated into ions in the dilute solution.

What is the molarity of the OH^- ions in 0.040 M ammonia, NH₃?

What is the molarity of the OH^- ions in 0.040 M sodium hydroxide, NaOH?

What is the molarity of the H⁺ ions in 0.40 M nitric acid, HNO₃?

What is the molarity of the NO₃^- ions in 0.40 M nitric acid, HNO₃?