Calculate the Kovats retention index for an unknown using the following retention times: 1.2 min for CH4, 11.4 min for octane, 16.0 min for the unknown, and 17.1 min for nonane

Solid NaI is slowly added to a solution that is 0.0083 M Cu⁺ and 0.0091 M Ag⁺.

Which compound will begin to precipitate first?

Calculate [Ag⁺] when CuI just begins to precipitate. Enter your answer in scientific notation.

What percent of Ag⁺ remains in solution at this point?

1.Why are there two different values for R?(R = 8.314472 JK^-1mol^-1 = 0.0820574 L atm K^-1 mol^-1

^2.Why are liquid barometers filled with mercury rather than water?

3. Using the concepts of the kinetic theory of gases, describe WHY one gas will diffuse through another.

4. Why does hot air rise? Prove your answer using the ideal gas equation

5. Why do gases show a positive deviation from ideal behaviour at high pressures? (i.e Why don’t they only show negative deviations?)

Material Science- Corrosion is one of the processes that affects the reliability of all engineering components. It is very complicated process and many factors are affecting it. However, when it comes to the fundamentals, it is not as complicated as one think. Basically, corrosion occurs in metals and their alloys because they are with electrons that are not saturated in bond states. Because of this, the work function plays a critical role in determining the corrosion susceptibility of metallic materials.

1) Alternate way of presenting corrosion susceptibility of metals is to compare standard chemical potential of electrons in metals or standard half cell voltage of metals. What is the standard chemical potential of electronics and the standard half-cell voltage? Can you prepare table showing the a few elemental metals and their standard chemical potential as well as half-cell potential?

2) The standard half-cell voltage does indicate whether material in your hand is corrosion prone or not. However, there are a few exceptions on this such as Cr and Al. In case of Cr, its potential is very much in the negative range but is very good at withstanding corrosion (that is a basis of stainless steel). Briefly explain why this is the case.

3) The worst form of corrosion failure is the Galvanic corrosion. Explain what it is and why it is so problematic for the component reliability.

4) Crevice corrosion can be analyzed in the frame work of Galvanic corrosion even if there is no obvious component that can create Galvanic couple with your piece. Briefly explain what type of condition can make Crevice corrosion to be similar to Galvanic corrosion.

is it possible to convert NO to N2O in our atmosphere? Explain why or why not

Please answer all numerically with three demical places. :)

A) What is the pH of a buffer prepared by adding 0.405 mol of the weak acid HA to 0.609 mol of NaA in 2.00 L of solution? The dissociation constant Ka of HA is 5.66×10−7.

B) What is the pH after 0.150 mol of HCl is added to the buffer from Part A? Assume no volume change on the addition of the acid.

D) What is the pH after 0.195 mol of NaOH is added to the buffer from Part A? Assume no volume change on the addition of the base.

Why is it necessary for scientists to understand chemical reaction rates?

a. What is the molar solublity of lead(II) chloride in water?

b. Should we be concerned about the chloride ion acting as a base? Why or why not?

A student mixes 50.0 mL of 1.00 M Ba(OH)₂ with 81.2 mL of 0.450 M H₂SO₄.

Calculate the mass of BaSO₄ formed.

Calculate the pH of the mixed solution.

340.0  gallons of 15.0 M nitric acid were added to a lake. The initial pH of the lake was 6.40 and the final pH was 4.50 . If none of the acid was consumed in chemical reactions, determine the volume of the lake. (IN LITERS)

When trying to purify fluorene, why does a NaOH extraction work best with Benzoic Acid, succinimide, and fluorenone but a HCl extraction works best with ethyl-4-aminobenzoate? Also, draw the acid/base reaction for each of the reactions.

1.Please describe how hybridization tells you about chemical structures? What is a good rule of thumb about where groups are arranged around any central atom? Provide a reaction mechanism (i.e. movement of electrons shown) for an organic reaction to illustrate the answer from 1 , and explain how the shape of the molecule changes during a chemical reaction

The pH change around the equivalence point for strong-base/weak-acid titration is usually not as great as that for strong-base/strong-acid. The statement is true or not. Explain.

What is the percent yield of dibenzalacetone when 0.212 g of benzaldehyde and 0.058 g of acetone was used in the experiment? I got a 0.885 g of product in the end.