How much 5.60M NaOH must be added to 410.0 mL of a buffer that is 0.0205 Macetic acid and 0.0235 M sodium acetate to raise the pH to 5.75?

You would like to combine 3 kg of adipic acid with hexamethyl diamine to produce the polyamide nylon. Calculate a) the amount of ethylene glycol required. b) the amount of by product evolved and c) the amount of polyester produced. c) Differentiate between Nylon 6 and Nylon 6,6.

Calculate the coulombic energy difference between the Calcium-39 and Potassium-39 mirror pair. Also calculate the difference between the Nitrogen-13 and Carbon-13 pair. How do these compare to the energy obtained from mass balance principles?

1) Consider the following acid ionization constants:

Solutions of each are prepared in which the inital concentration of the acid is 0.1000 M. Which of the four solutions will have the lowest pH?

the answer is HA

Explain why it is HA

2) A certain first order reaction is 30% complete in 115 minutes. what is the half life ( t1/2) of the reaction?

a) 192 min

b) 223 min

c) 268 min

e) 66.2 min

ANSWER ALL QUESTIONS AND EXPLAIN WHY YOU CHOSE THE ANSWER

Theoretically, fractional distillation gives better separation than simpledistillation

.� Use mole ratios for early and late fractions from both simple and fractionaldistillations determined by GC analysis to calculate the volume and mole %composition of each. Present a single model of those calculations.

� Compare these mole % composition results to explain whether your experimentaldata supports this theory.

Data: Mole Ratio cyclohexane:touluene

Orginal mix: 1:1.05

early fractional simple : 1: 0.37

Late fractional simple : 1: 25

Early Fraction fractional: 1: 0.204

Late fraction fractional: 1: 194

What observed rotation is expected when a 1.62 M solution of (R)-2-butanol is mixed with an equal volume of a 0.810 M solution of racemic 2-butanol, and the resulting solution is analyzed in a sample container that is 1 dm long? The specific rotation of (R)-2-butanol is –13.9 degrees mL g–1 dm–1. The unit of the answer is in degree, NOT in degrees mL g–1 dm–1.

A 6.210 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 10.34 grams of CO2 and 3.388 grams of H2O are produced. In a separate experiment, the molar mass is found to be 132.1 g/mol. Determine the empirical formula and the molecular formula of the organic compound.

A voltaic cell utilizes the following reaction and operates at 298 K. 3 Ce4+(aq) + Cr(s) 3 Ce3+(aq) + Cr3+(aq)

(a) What is the emf of this cell under standard conditions? V

(b) What is the emf of this cell when [Ce4+] = 2.0 M, [Ce3+] = 0.014 M, and [Cr3+] = 0.011 M? V

(c) What is the emf of the cell when [Ce4+] = 0.56 M, [Ce3+] = 0.82 M, and [Cr3+] = 1.3 M? V

2H_{2(g) +}O_{2 (g)} <=> 2H₂O (g)

the above equilibrium experiences a sudden decrease in pressure. which one of the following will then occur?

1) dec in mole of h2

2) incr in mole of H20

3) incr in mole of 02

4) Total mole would decrease

The answer is 3). Can you explain why

What are the intermolecular forces involved with NH3?

A 35.0-mL sample of 0.150 M acetic acid (CH3COOH) is titrated with 0.150 MNaOHsolution. Calculate the pH after the following volumes of base have been added.

50.0 mL

Express your answer using two decimal places.

have each group make two flash cards with an acid or a base on one side and its cconjugate on other side .Check each other cards and quiz each other unit each group member is proefficient at identify conjugate pairs. explain in brief

Please answer fast

Write the balanced equation for each step in glycolysis (conversion of glucose into pyruvate) and calculate the free energy change (in kJ/mol) for this overall pathway.

The following questions refer to the following system 3.5E2 ml of 3.2 M Pb (NO3)2 and 2.0E2 mL of 0.020 M NaCl are added together. KSP for the chloride is 1.6E-5

a.) determine the ion product?
b.) will precipitation occur?
c.) What is the limiting reagent in the formation of lead chloride?
d.) Determine the equilibrium
concentration of the chloride ion?

As you saw in Part B, the vapor above the cyclohexane-acetone solution is composed of both cyclohexane vapor and acetone vapor. What mole fraction of the vapor above the solution, X cy (vapor) , is cyclohexane?

A solution is composed of 1.10 mol cyclohexane (P ∘ cy =97.6 torr ) and 2.30 mol acetone (P ∘ ac =229.5 torr ). What is the total vapor pressure P total   above this solution? i found the solution