Michael S.

09/24/21

A-Level Chemistry Equilibrium Question

N2O4(g) <==> 2NO2(g) Kp = 0.115 atm at 298K If the equilibrium partial pressure of N2O4 is 0.500 atmosphere, calculate the equilibrium partial pressure of NO2, and the total... more

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Chemistry

09/24/21

A-Level Chemistry equilibrium question

If solid PCl5 is heated to 200 degrees celsius, it vaporises and dissociates according to the equation: PCl5(g) <==> PCl3(g) + Cl2(g) Kp = 160kPa at 200 degrees celsius90.0% of... more

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Chemistry

09/23/21

At a certain temperature, 0.920 mol SO3 is placed in a 2.00 L container.

2SO3(g)↽−−⇀2SO2(g)+O2(g)At equilibrium, 0.120 mol O2 is present. Calculate 𝐾c.

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Chemistry

09/23/21

General Chemistry I

In Bohr's model of the hydrogen atom, which is no longer the standard for understanding the atom, the electron revolves around the nucleus in one of an array of available orbits. Each orbit is... more

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Chemistry Vant Hoft Factor

09/22/21

Finding the Van't Hoft factor

I am given the following values for a sulfuric acid aqueous soution. Molal: .5Mass: 6.9401It lowered the freezing point to -4.88 *CI need help solving this and would appreciate being walked through... more

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Chemistry

09/22/21

Calculate the activation energy for the reaction. Express your answer in kilojoules per mole to three significant figures.

The rate constant () for a reaction was measured as a function of temperature. A plot of versus (in ) is linear and has a slope of −1.17×104 .

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Chemistry Physics

09/22/21

Conversion in the English System by using ratio and proportion

a) 0.25 yards to inches b) 1.2 gallons to fluidrams c) 160 grains to drachm d) 380 minims to fluidram

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Chemistry

09/21/21

Please find the balanced equation, theoretical yield, atom economy and estimated e factor )

Please find the balanced equation, theoretical yield, atom economy and estimated e factor )based on the procedure To prepare the catalyst, sodium molybdate dihydrate (0.30 g; 1.2 mmol), and 4 M HCl... more

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Chemistry

09/19/21

A2 (g) + B2 (g) ⇋ 2 AB (g) Kc is 116.4, initial concentrations are: [A2] = 0.200 M, [B2] = 0.200 M, [AB] = 0.770 M, what will be the equilibrium concentration of AB (in M)?

Consider the following equilibrium:A2 (g) + B2 (g) ⇋ 2 AB (g)If the value of Kc for this reaction is 116.4, and the initial concentrations of each species are: [A2] = 0.200 M, [B2] = 0.200 M, [AB]... more

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Chemistry

09/19/21

Chemistry I Chapter 3 HW

How many moles of CaCO3 are there in an antacid tablet containing 0.500 g CaCO3? Answer: .005 mol CaCO3How many formula units of CaCO3 are in this tablet?I am confused on how I get this answer? ^

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Chemistry

09/14/21

Three Chemical Reactions

A,Copper (s) + nitric acid (aq) ---------------> Copper (II) nitrate (aq) + nitrogen dioxide (g) + Water (l) Cu + 4HNO3 ---------> Cu (NO3)2 + 2NO2 + 2H2OB.Copper (II) nitrate (aq)... more

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Chemistry

09/14/21

What is ΔG°rxn in kJ/mol for the following reaction at 587.5 Kelvin? Please report 2 decimal places, without units. 2NO(g) + Cl2(g) → 2NOCl(g)

Substance: NO(g) Cl2(g) NOCl(g) ΔH°f (kJ/mol) at 298 K 90.29 0 51.71 ΔG°f (kJ/mol) at 298 K 86.60 0 66.07 S°(J/K • mol) at 298 K 210.65 223.0 261.60

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Chemistry

09/14/21

It is determined that the remaining mass of unknown bromide salt (XBr3) is 2.84g. Evaluate the water of crystallization (y).

In order to determine the water of crystallization (y) of the unknown bromide salt, 3.70g hydrated unknown bromide salt (XBr3 . yH2O) was placed into 105oC oven for 2 days to remove all water of... more

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Organic Chemistry

09/08/21

Give product of these acid base reaction Classify each as Lewis or bronsted sent type reaction. Draw a curved arrow to show the flow of electrons from base to acid.

Me3p: + H3O + —EtOH—> _____?___

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Organic Chemistry

07/16/21

Explain the effect of substrate and quantity of catalyst in the esterification reaction.

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Chemistry

07/04/21

Experiment 1: Calorimetry8Task 9. DiscussionUse Hess’s law and the two standard enthalpies of solution that you just calculated to determine the standard enthalpy of neutralization for the reaction

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Chemistry

07/03/21

how does liquid carbon dioxide relate to Chemical Systems in Equilibrium

please I need explanation and long answers

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Chemistry

06/30/21

The indicator methyl red has a pKHIn = 4.95. It changes from red to yellow over the pH range from 4.4 to 6.2.What colour would you expect the solution in question 13 above to most look like?

PLS ANSWER THE QUESTION.

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Chemistry Organic Chemistry

06/10/21

Write the reactions of Aromatic Primary - aliphatic secondary and tertiary amines with 2 N HCl and 5% NaNO2 in an ice bath at 5 °C.

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Chemistry Organic Chemistry

06/06/21

Chemical equation for PLA plastic breakdown in anaerobic conditions

Make any necessary assumptions, thanks!

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Chemistry

05/26/21

Define and explain the cause of the surface tension of water.

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Chemistry

05/26/21

State the main points in the kinetic-molecular theory of gases.

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Chemistry

05/25/21

How and if decreasing volume can affect reaction rate

Will decreasing volume for a reaction with the following phase affect the reaction rate?If so, will it increase, decrease the rate or there is no change?X (s) + YZ (aq) ----> XY (aq) + Z (g) more

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Chemistry

05/25/21

Help Me with this chemistry question

which element/ion has the largest atomic/ionic size in each of the following pairs?Na or Na+1 f) I-1 or Cl-1 k) Na+1 or Al+3 S or S-2 g) Se-2 or S-2 l) Br... more

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Chemistry

05/24/21

Which IE/EN is Larger?

With K+, Cl-, S2-K+ has the smallest radius size and S2- has the largest?K+ < Cl-, S2+So for IE/EN, will the ranking smallest to biggest just the opposite of the above?S2+ < Cl- < K+ (... more

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A-Level Chemistry Equilibrium Question

A-Level Chemistry equilibrium question

At a certain temperature, 0.920 mol SO3 is placed in a 2.00 L container.

General Chemistry I

Finding the Van't Hoft factor

Calculate the activation energy for the reaction. Express your answer in kilojoules per mole to three significant figures.

Conversion in the English System by using ratio and proportion

Please find the balanced equation, theoretical yield, atom economy and estimated e factor )

A2 (g) + B2 (g) ⇋ 2 AB (g) Kc is 116.4, initial concentrations are: [A2] = 0.200 M, [B2] = 0.200 M, [AB] = 0.770 M, what will be the equilibrium concentration of AB (in M)?

Chemistry I Chapter 3 HW

Three Chemical Reactions

What is ΔG°rxn in kJ/mol for the following reaction at 587.5 Kelvin? Please report 2 decimal places, without units. 2NO(g) + Cl2(g) → 2NOCl(g)

It is determined that the remaining mass of unknown bromide salt (XBr3) is 2.84g. Evaluate the water of crystallization (y).

Give product of these acid base reaction Classify each as Lewis or bronsted sent type reaction. Draw a curved arrow to show the flow of electrons from base to acid.

Explain the effect of substrate and quantity of catalyst in the esterification reaction.

Experiment 1: Calorimetry8Task 9. DiscussionUse Hess’s law and the two standard enthalpies of solution that you just calculated to determine the standard enthalpy of neutralization for the reaction

how does liquid carbon dioxide relate to Chemical Systems in Equilibrium

The indicator methyl red has a pKHIn = 4.95. It changes from red to yellow over the pH range from 4.4 to 6.2.What colour would you expect the solution in question 13 above to most look like?

Write the reactions of Aromatic Primary - aliphatic secondary and tertiary amines with 2 N HCl and 5% NaNO2 in an ice bath at 5 °C.

Chemical equation for PLA plastic breakdown in anaerobic conditions

Define and explain the cause of the surface tension of water.

State the main points in the kinetic-molecular theory of gases.

How and if decreasing volume can affect reaction rate

Help Me with this chemistry question

Which IE/EN is Larger?

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