In polymer Chemistry, Give description on a specific characterization method.

When calcium carbonate is added to hydrochloric acid, carbon dioxide, and water are produced.

CaCO3(s)+2HCl(aq)--->CaCl2(aq)+H2O(l)+CO2(g)

a. How many grams of calcium chloride will be produced when 27.0g of calcium carbonate are combined with 12.0g of hydrochloric acid?

2. Which reactant is excess and how many grams of this reactant will remain after the reaction is complete?

Suppose that the partition coefficient for an amine, B, is K = 3.0 and the acid dissociation constant for BH+ is Ka = 1.0 x 10−9. If 50.0 mL of 0.010 M aqueous amine is extracted with 100.0 mL of solvent two times, what percentage amine remains in aqueous solution if the pH of the aqueous phase is 9.00?

Complete the stoichiometry table using the starting values provided. reagent molecular weight mass (g) mmoles equivalents density (g/mL) vol. (mL) bromobenzene 0.355 1.993 magnesium 1.501 benzophenone 1 diethyl ether 27.063 theoretical product triphenylmethanol melting point of triphenylmethanol (°C) Please show calculations also especially for magnesium, benzophenone, diethyl ether, and triphenylmethanol

How many milligrams of magnesium metal must react with excess HCI to produce 50.50 mL of H2 (g), measured at 25 degrees Celsius and 775 torr? Show all calculations in this problem.

Mg (s) + 2 HCl (aq) --> MgCl2 (aq) + H2 (g)

1. Calulate the %(m/v) ad M of a solution made by dissolving .4g of K2SO4 in water and diluting to a volume of 50.00 ML.

2. Show (by use of eq. 5) how the first dilution of the 1 M solution of NaCl results in a .01 M Solution

3. How many mL of a stock solution of a 5.0% solution of NaNo3 are needed to make 1.5 L of a .25 % solution of NaNo3.

Please show work

Iron(III) oxide reacts with carbon monoxide according to the equation:

Fe2O3(s)+3CO(g)→2Fe(s)+3CO2(g)

A reaction mixture initially contains 22.10 g Fe2O3 and 14.00 g CO.

Once the reaction has occurred as completely as possible, what mass (in g) of the excess reactant remains?

Express your answer to three significant figures.

Suppose that in an alternate universe, the possible values of l were the integer values from 0 to n(instead of 0 to n−1). Assuming no other differences from this universe, how many orbitals would exist in each of the following levels?

n = 4

DQ 11: Given that the solubility product of PbI₂ is expressed as K_sp = [Pb²⁺][I^–]², calculate the K_sp of PbI₂ from the concentration of Pb²⁺ found in Step 6 of the Data Analysis. (Hint: Think about the stoichiometry involved when PbI₂ was initially formed… how much I^– was left unreacted?) Is PbI₂ a soluble or insoluble salt? Explain.

3mL of 0.05M KI was used and 1mL of 0.05 Pb(NO3)2 was used to make the PbI2 solution/yellow precipitate

All work must be shown below for credit.

(2 pts) Show a properly balanced chemical equation:

Pb(NO₃)_2(aq)+ 2KI_(aq)--> PbI_2(s)+2KNO^-_3(aq)

(4 pts) Determine the limiting reagent:

(2 pts) Calculate the K_sp of PbI₂:

(2 pts) Is PbI₂ a soluble or insoluble salt? Explain:

Consider a 0.20 M NH4Cl aqueous solution. Rank the following species in the solution from highest to lowest concentration.

NH3, Cl-, H2O, NH4+, OH-, H3O+

Consider a 0.10 M aqueous solution of sodium nitrite, NaNO2. Rank the following species in the solution from highest to lowest concentration.  

OH-, HNO2, NO2-, H3O+, H2O, Na+

The acetate ion is the conjugate base of acetic acid. The Ka of acetic acid is 1.76×10–5. What is the pH of a 0.100 M solution of sodium acetate?

Consider the titration of 60.0 mL of 0.100 M NH3 Kb= 1.8 x 10^-5 with 0.150 M HCl. Calculate the pH after the following volumes of titrant have been added: 40.5 mL & 60.0 mL

Two 2.0-cm-diameter insulating spheres have a 7.00 cm space between them. One sphere is charged to + 70.0 nC , the other to - 79.0 nC . Part A What is the electric field strength at the midpoint between the two spheres? Express your answer with the appropriate units.

Although coal is no longer the favored energy source, U.S. coal mines still produced close to a billion short tons of coal. Detail 5 different forms of coal, including activated carbon, and chemical products and health hazards related to each different form. Describe DOT recommended response actions to incidents involving a release of coal and/or carbon.

Why is the mixture of .033 M of H₂SO₃ and .033 M of NaSO₃ not good buffers?

Phosphoric acid is a triprotic acid (Ka1 = 6.9× 10–3, Ka2 = 6.2× 10–8, and Ka3 = 4.8× 10–13). To find the pH of a buffer composed of H2PO4–(aq) and HPO42–(aq), which pKa value would you use in the Henderson-Hasselbalch equation?

Calculate the pH of a buffer solution obtained by dissolving 15.0 g of KH2PO4(s) and 33.0 g of Na2HPO4(s) in water and then diluting to 1.00 L.