Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction

2COF2(g)⇌CO2(g)+CF4(g),    Kc=7.40

If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium?

Where I get stuck is figuring out how to multiply (x)(x)/ (2.00-2x)^2 I know this is easy math but can you please work it out step for step so that I can see exactly how you go the answer.

The reaction between silver nitrate and zinc chloride is 95% effective. If 250 g of silver nitrate reacts with 250 g of zinc chloride, what will be the actual yield of the products?


THANKS SO MUCH FOR YOUR HELP.

PLEASE SHOW ALL WORK. I WILL RATE

The center of a cubic hole is found ________

A semipermeable membrane separates two aqueous solutions at 37 °C. For each of the following cases, name the solution into which a net flow of water (if any) will occur.

Net flow is toward solution a; Net flow is toward solution B; no net flow

choices to be labeled under the 3 categories above:

- Solution A= 0.10M NaCl (aq) Solution B=0.01 M NaCl (aq)

-Solution A=0.20 M KCl (aq) Solution B= 0.20 M NaCl (aq)

-Solution A= 0.10 M NaHCO3 (aq) Solution B= 0.20 M NaHCO3 (aq)

particles undergoing diffusion move a few millimeters per hour. In reality, particles are traveling around 500 m/s. The slow overall movement is because they collide with other particles very frequently. (density of water =1000 kg/m^3, Avogadro's # = 6.022x10^23 particles/mole, mass of the earth =5.97 x10^24 kg) using Xrms = sqrt(2Dt)

a. Estimate how far a water molecule travels before colliding with another water molecule.

b. How much time is in between each collision?

c. How many collisions occur for a molecule that diffuses 1 mm in 1 hour? d. Use your estimates from a, b, and c to figure out how many times a water molecule moves away from its starting point and how many times it moves towards it to end up 1 mm away after 1 hour.

Assuming ideal behavior, which of the following aqueous solutions would be expected to exhibit the largest freezing-point lowering?

a. 0.1 m CaCl2

b. 0.05 m CH3COOH

c. 0.05 m Al2(SO4)3

d.0.1 m RbCl

The answer key I have says the answer is A, is that correct?

Calculate the diffusion coefficient of N₂ at 100 Pa, 100 kPa an 20 MPa (temperature T = 20 degrees celsius).

1.What will happen when you add ammonium hydroxide to sodium hydroxide?

2.Explain why acetic acid and sodium acetate can exist in an equilibrium but hydrochloric acid and sodium hydroxide cannot.

3.How will cobalts equilibrium with 1M HCL differ from its equilibrium with concentrated H2SO4?

Suppose two blocks of iron, each having 1 mol of iron atoms, are at differing temperatures and are then brought together in an otherwise isolated system. One of the blocks is at 273.15 K and the other is at 373.15 K and the process is carried out at 1 bar pressure.

a.) Would you expect ∆Ssys < 0, ∆Ssys = 0, ∆Ssys > 0 ?

b.) Using common sense and high school physics (and perhaps the First Law), what is the common final temperature of the two blocks?

c.) Calculate ∆Ssys for the process (use Table 4.1 for any needed molar heat capacities needed, and assume that the molar heat capacities are independent of T).

d.) What is q for the isolated system? How does this value of q and the result of part C relate to the Clausius inequality: final initial d q S T − ∆ ≥ ∫ ?

e.) Interpret this change in entropy in terms of the ordering-disordering effects involved in the transfer of given amount of heat from a block at higher temperature to one at a lower temperature (i.e. the disordering effect of adding a given q to the cooler block vs the ordering effect of removing the same q from the hotter block).

Molar heat capacity of Fe(s) ==> Cp,m (J / mol*K) = 25.1

The reaction 2H2S(g)⇌2H2(g)+S2(g) Kc=1.67×10−7 at 800∘C is carried out with the following initial concentrations: [H2S] = 0.325 M , [H2] =0.125 M , and [S2] = 0.00 M. Find the equilibrium concentration of [S2].

how does hot water separate silver (1) chloride from lead (2) chloride?

Copper reacts with dilute nitric acid according to:
3 Cu(s) + 8 HNO3(aq) ? 3 Cu(NO3)2(aq) + 2 NO(g) + 4 H2O(l)

If a copper penny weighing 3.045-g is dissolved in 37.23 mL of 3.750 M nitric acid and the resultant solution is diluted to 50.00 mL in a volumetric flask, what is the final concentration of NO3- in the solution?

A. An unknown radioactive substance has a half-life of 3.20hours . If 10.6g of the substance is currently present, what mass A0 was present 8.00 hours ago?

B. Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 45.0{\rm \\%} of an Am-241 sample to decay?

C. A fossil was analyzed and determined to have a carbon-14 level that is 20{\rm \\%} that of living organisms. The half-life of C-14 is 5730 years. How old is the fossil?

Consider the cadmium electrode, whose half-reaction is shown below. Calculate the potential of the electrode at 25 °C under the given conditions. A) Immersed in a 0.0120 M solution of CdBr2. B) Immersed in a 0.0490 M NaOH solution that is saturated with Cd(OH)2. Ksp for Cd(OH)2 is 7.2 × 10–15. C) Immersed in a 0.0140 M Cd(NH3)42 and 0.375 M NH3 solution. β4 for Cd(NH3)42 is 3.63 × 106.

Using the following portion of the activity series for oxidation half reactions

K(s) → K+ (aq) + e-

Al(s) → Al3+ (aq) + 3e-

Fe(s) → Fe2+ (aq) + 2e-

Sn(s) → Sn2+ (aq) + 2e-

Determine which reaction will occur.

A) Al3+(aq) with Fe(s)

B) Al(s) with Sn(s)

C) K+(aq) with Fe2+(aq)

D) K(s) with Sn2+(aq)