Questions
a lead cube density 11.34g/ml heat capacity .128j/g at230 degrees c is dropped in 1.20 l...

a lead cube density 11.34g/ml heat capacity .128j/g at230 degrees c is dropped in 1.20 l toluene density .867 g/ml heat cap 1.72j/g at 22.5 degrreec what is the length of one edge of cube if final temp is 24.5

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Qualitative Predictions about Entropy Entropy is the randomness of a system. At the molecular level, entropy...

Qualitative Predictions about Entropy Entropy is the randomness of a system. At the molecular level, entropy can be described in terms of the possible number of different arrangements of particle positions and energies, called microstates. The more microstates the system has, the greater its entropy. Microstates depend on molecular motion. Molecules may undergo three different types of motion: translational motion, vibrational motion, and rotational motion. During translational motion, the entire molecule moves in one direction. During vibrational motion, atoms in a molecule move toward and away from one another. During rotational motion, molecules rotate or spin. The number of molecules, the space available for the molecules, and the energy available to the molecules will impact the number of microstates. Another way of looking at entropy is that the universe is moving toward a broader distribution of energy. The universe has a constant amount of energy as stated in the first law of thermodynamics. The universe started with low entropy (concentrated in the moment before the "big bang") and the entropy has since been constantly increasing by distributing this energy. Heat distribution from high temperature to low temperature is a another example of this phenomenon. Part A Rank these systems in order of decreasing entropy. Rank from highest to lowest entropy. To rank items as equivalent, overlap them. Hints HelpReset Least entropyGreatest entropy 1 mol of neon gas at 273 K and 40 L 1 mol of chlorine gas at 273 K and 40 L 1 mol of hydrogen peroxide gas at 273 K and 40 L 1 mol of neon gas at 273 K and 20 L 1/2 mol of neon gas at 273 K and 20 L 1/2 mol of neon gas at 100 K and 20 L 1/2 mol of liquid neon at 100 K The correct ranking cannot be determined. SubmitMy AnswersGive Up Incorrect; Try Again; 4 attempts r

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A volatile liquid has an enthalpy of vaporization of 31.6 kJ/mol, and a vapor pressure of...

A volatile liquid has an enthalpy of vaporization of 31.6 kJ/mol, and a vapor pressure of
224 mmHg at a temperature of 25.0 oC. What is the normal boiling point of the liquid?

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state the laws of definite proportions and multiple proportions. illustrate each with an example.

state the laws of definite proportions and multiple proportions. illustrate each with an example.

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In your lab you are studying the kinetics of the degradation of a pain killer in...

In your lab you are studying the kinetics of the degradation of a pain killer in the human liver. You are monitoring the concentration of the pain killer over a period of time. The initial concentration of the pain killer in your experiment was 1.51 M. After 15.58 hours the concentration was found to be 0.7550 M. In another 15.58 hours the concentration was found to be 0.3775 M (t = 31.16 hours overall).

If another experiment were set up where the initial concentration of the pain killer was 0.383 M, how long would it take for the pain killer concentration to reach 0.0205 M?

Also, for this type of problem, how can I determine the order?

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please show chemical reaction of 4bromobenzophenone with beilstein test, ignition test, 2,4-dnph test

please show chemical reaction of 4bromobenzophenone with beilstein test, ignition test, 2,4-dnph test

In: Chemistry

How many mL of 0.200 M NaOH must be added to 100.0 mL of a 0.0500...

How many mL of 0.200 M NaOH must be added to 100.0 mL of a 0.0500 F solution of fumaric acid (transbutenedioic acid) to make a buffer of pH 4.50? Hint: What species do you need in solution to achieve this pH?

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A 0.30 solution of a weak acid(HA) has a pH of 3.77. What is the Ka?

A 0.30 solution of a weak acid(HA) has a pH of 3.77. What is the Ka?

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A 23.130 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is...

A 23.130 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 80.347 g of water. A 13.078 g aliquot of this solution is then titrated with 0.1061 M HCl. It required 29.58 mL of the HCl solution to reach the methyl red endpoint. Calculate the weight percent NH3 in the aqueous waste.

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When exposed to air, aluminum metal, Al, reacts with oxygen, O2, to produce a protective coating...

When exposed to air, aluminum metal, Al, reacts with oxygen, O2, to produce a protective coating of aluminum oxide, Al2O3, which prevents the aluminum from rusting underneath. The balanced reaction is shown here: 4Al+3O2→2Al2O3 Part A What is the theoretical yield of aluminum oxide if 3.40 mol of aluminum metal is exposed to 2.85 mol of oxygen? Express your answer with the appropriate units.

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1. Balance the following redox equation in acid. Put the correct stochiometric coefficient (0, 1, 2,...

1. Balance the following redox equation in acid. Put the correct stochiometric coefficient (0, 1, 2, etc.). (Note: 0 if the species does not appear on that side of the equation.)

HSO3(aq) + MnO4(aq) + H+(aq)  → SO42−(aq) + Mn2+(aq) + H2O(l)

2. Balance the following redox equation in base. Put the correct stochiometric coefficient (0, 1, 2, etc.). (Note: 0 if the species does not appear on that side of the equation.)

Fe(OH)2 (s) + CrO42-(aq) + H2O(l)   → Fe(OH)3(s) +  [Cr(OH)4] (aq) + OH(aq)

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NO2 (g) + OH• (g)à HNO3 (g) The rate constant for this reaction is 1.2x10-11 cm3...

  1. NO2 (g) + OH (g)à HNO3 (g)

The rate constant for this reaction is 1.2x10-11 cm3 molecule-1s-1.

  • Write the rate law for this reaction.
  • hydroxyl radical concentration in atmosphere is 2.0 x106 molecules cm-3 at 25 oC, find the atmospheric lifetime of NO2 at 25 oC (in hours)
  • Use the information from first second , determine the concentration of hydroxyl radicals in ppbv at 25 oC and 1.0 atm.

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A sample of a hydrocarbon produced 3.14 grams of CO2 and 1.28 grams of H2O during...

A sample of a hydrocarbon produced 3.14 grams of CO2 and 1.28 grams of H2O during combustion analysis. If the hydrocarbon has a molar mass between 50 and 60 g/mol, what is its molecular formula? (1) C3H6 (2) C3H8 (3) C4H4 (4) C4H8 (5) C4H10

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in the oxidation of cyclohexanol to cyclohexanone, if you begin with .15mL what is your percent...

in the oxidation of cyclohexanol to cyclohexanone, if you begin with .15mL what is your percent yield if you obtained 0.071 mL of cyclohexanone? (density of cyclohexanol is 0.962 g/ml and density of cyclohexanone is 0.950g/mL

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does anyone know the following questions: 1) the types of fruits and vegetables contain base substance...

does anyone know the following questions:

1) the types of fruits and vegetables contain base substance

2) the basic substance in it (including the name and structure)

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