2PbS(s)+3O2(g)→2PbO(s)+2SO2(g) Sulfur dioxide can then react with oxygen in air to form sulfur trioxide. Classify this reaction as a synthesis, decomposition, single-displacement, or double-displacement reaction.

A.) The equilibrium constant for the reaction A(g) ⇌ B(g) is 10² . A reaction mixture initially contains [A] = 18.6 M and [B] = 0.0 M. Which statement is true at equilibrium?

B.) Determine the value of K_c for the following reaction if the equilibrium concentrations are as follows: [H₂]_eq = 0.14 M, [F ₂]_eq = 0.39 M, [HF]_eq = 1.6 M.

H₂(g) + F ₂(g) ↔ 2 HF(g)

C.) The equilibrium constant is equal to 5.00 at 1300 K for the reaction:

2 SO₂(g) + O₂(g) ↔ 2 SO₃(g).

If initial concentrations are [SO₂] = 3.60 M, [O₂] = 0.45 M, and [SO₃] = 5.40 M, the system is

D.) The equilibrium constant, K _p, equals 3.40 for the isomerization reaction:

cis-2-butene ↔ trans-2-butene.
If a flask initially contains 0.250 atm of cis-2-butene and 0.165 atm of trans-2-butene, what is the equilibrium pressure of each gas?

E.) Consider the reaction SO₂(g) + NO₂(g) ↔ NO(g) + SO₃(g) at 460°C. What is the equilibrium concentration of the SO₃ if the initial concentrations are [SO₂] = [NO₂] = 3.00 x 10^-3 M and [NO] = [SO₃] = 4.00 x 10^-2 M? The value of the equilibrium constant for the reaction is 85.0 at 460°C.

What is the mode of synthesis of Ortho Tri-Cyclen (Norgestimate and Ethinyl Estradiol)?

A.) For which reaction will K_p = K_c?

B.) How does an increase in the pressure within the container by the addition of the inert gas E affect the amount of C present at equilibrium for the following reaction?
A(g) + 3 B(g) ↔ 2 C(g) + D(g)           ΔH° = -65 kJ

C.) Which statement is true for the following reaction at equilibrium at 25°C?

H₂(g) + Br₂(g) ⇌ 2HBr(g); K = 1.9 × 10¹⁹

D.) If the temperature is increased and some oxygen is removed, how does this affect the amount of the Cl₂ present at equilibrium for the following reaction?

4 HCl(g) + O₂(g) ↔ 2 H₂O(g) + 2 Cl₂(g)           ΔH° = 120 kJ

I was given this information and I need to draw a calibration curve of dissociation for carbon- Please help. I am having a difficult time getting started.

Find pH of 1.) 0.300 M H2CO3

2.) 0.300 M HCO3

3.) 0.300 M CO3^2

give one advantage and one disadvantage of using 9.0 of alumina in your column instead of 4.5 g as you did during the column chromatography experiment in lab.

when we performed the TLC experiment, the class chose a mixture for the mobile phase of 80 % ethyl acetate and 20 % hexanes. why was this composition chosen

Write the complete molecular equation (CME), the complete ionic equation (CIE), and the net ionic equation

(NIE) for a mixture of the following aqueous solutions. Use solubility rules to determine what solid is formed, if any.

Potassium carbonate and Magnesium nitrate

Ammonium sulfide and Copper (II) acetate

Mercury (I) nitrate and Sodium iodide

Potassium oxalate and Lead (II) nitrate

in a sodium carbonate/bicarbonate analysis, a 0.4057g sample required 15.65mL of 0.1690 MHCl solution to reach the phenolphtalein end point and a total of 40.30mL to achievve the bromocresol green endpoint. Determine wt % NaHCO3 and Na2CO3 in this sample. Fromula weights of NaHCO3 and NA2CO3 are 84.0 and 106.0g/mol.

1. It requires 10.9 mL of 0.50 M NaOH to neutralize 15.0 mL of an unknown H3PO4 solution. a. Balance the reaction equation. H3PO4 + NaOH Na3PO4 + H2O b. Calculate the initial H3PO4 concentration. 2. It requires 28.1 mL of 16.0 mM H2SO4 to neutralize 11.0 mL of an unknown Ca(OH)2 solution. a. Balance the reaction equation. H2SO4 + Ca(OH)2 ⇋ CaSO4 + H2O b. Calculate the initial Ca(OH)2 concentration.

Add the physical state for each substance in the following aqueous reactions. Then write and balance a net ionic equation for each reaction.

Illustrate the mass spectrum of ammonia (gas) ionized by electron impact (EI) using 70 eV electrons

and Illustrate the spectrum for 12 eV electrons.

What form of NMR might be used to characterize ammonia?

Illustrate and label the NMR spectrum and list some of the principal characteristics of NMR spectroscopy as a qualitative and quantitative analytical method

if 45.55ml of 0.0105M EDTA solution was needed to titrate the Mg in a 0.2600g sample of the mineral hydromagnesite, 3MgCO3Mg (OH)2• 3H2O (365.3 g/mol), what was the weight percent of hydromagnesite in the sample? what was the weight percent ofMg+2 in the sample.

Use standard enthalpies of formation to calculate ΔH∘rxn for the following reaction:

C(s)+H2O(g)→CO(g)+H2(g)

Express your answer using four significant figures.

Use standard enthalpies of formation to calculate ΔH∘rxn for the following reaction:

N2O4(g)+4H2(g)→N2(g)+4H2O(g)

Express your answer using four significant figures.

26.
A solution of 0.075 M CoBr2 is saturated with H2S ( [H2S] = 0.10 M). What is the minimum pH at which CoS ( Ksp = 5.9 x 10 -21) will precipitate?
Ka1 =8.9 x 10 -8 & Ka2 = 1.2 x 10 -13 for H2S Ksp for CoS = 5.9 x 10 -21