Are all liquid crystal polymers? What are thermotropic and lyotropic liquid crystals? What is the difference between nematic, smectic and cholesteric liquid crystals? Are those three the only possible liquid crystal phases?

What are four reasons that BOD5 is tested at a WWTP?

Three candidates showed up for an interview. Of all the candidates, only one was appropriated for the job. The first candidate arrived promptly and was dressed professionally. She spoke articulately and seemed a good fit for the organization. The next candidate was also on time, but his dress shirt was stained, his tie was crocked, and he seemed to struggle with the standard interview questions. His performance during the interview was not as impressive as the first candidate’s performance. The final candidate, dressed T-shirt and ripped jeans, arrived a full hour past the scheduled interview time. Because of her tardiness did not interview her.

Q1. Which of the following inferences can the reader draw according to the passage?

A. Preparing for a job interview can compensate for inappropriate business attire

B. A wide variety of applicants for this position ensure the company will find a good candidate

C. Tardiness for a job interview will be interpreted as laziness and disorganization.

D. Being on time for a job interview and dressing appropriately is important to securing.

Q2. Which of the following sentences from the passage is a fact?

A. Because of her tardiness, we did not interview her.

B. Of all the candidates, only one was appropriate for the job

C. His performance during the interview was not as impressive as the first candidate

D. She spoke articulately and seemed a good fit for the organization.

Q3. Which of the following is the writer’s purpose for writing this passage?

A. To change

B. To stereotype

C. To explain

D. To analyze

Specify the number of degrees of freedom for the following alloys:

(a) 95 wt% Ag–5 wt% Cu at 780°C

(b) 80 wt% Ni–20 wt% Cu at 1400°C

(c) 44.9 wt% Ti–55.1 wt% Ni at 1310°C

(d) 61.9 wt% Sn–38.1 wt% Pb at 183°C

(e) 2.5 wt% C–97.5 wt% Fe at 1000°C

Describe three different separation processes and identify the physical/chemical/biological principle on which the separation is based.

Determine the pOH (to two decimal places) of the solution that is produced by mixing 5.83 mL of 4.19×10-2 M Mg(OH)2 with 918 mL of 3.52×10-3 M SrH2.

A vertical cylinder 76.2mm in diameter and 121.9mm high is maintained at 397.1K at its surface. It loses heat by natural convection to air at 294.3K. Heat is lost from the cylindrical side and the flat circular end at the top. Calculate the heat loss, neglecting radiation losses. Use the simplified equations of Table 1.5-2 and those equations for the lowest range of GrPr. The equivalent L use the top flat surface is 0.9 times the diameter

In textbook Engineering and Chemical Thermodynamics (2nd Edition), chapter 7 problem 33

7.33 A mixture of 2 moles propane (1), 3 moles butane (2), and 5 moles pentane (3) is contained at 30 bar and 200°C. The van der Waals constants for these species are: Species a3Jm3mol22 4 b3m3/mol4 Propane 0.94 9.06 3 1025 Butane 1.45 1.22 3 1024 Pentane 1.91 1.45 3 1024 Determine the fugacity and fugacity coeffi cient of propane using the following approximations: (a) the Lewis fugacity rule (b) the virial form of the van der Waals equation truncated to the second term.

Im unsure how to find partial molar volume here.

A benzene/toluene liquid mixture consisting of 31 mole% benzene is fed to a reboiler, where 1250 KW of heat is provided causing the mixture to partially vaporize. The vapor output has a flowrate of 80 kmol/hr and consists of 40 mole% benzene. The liquid output has a flowrate of 100 kmol/hr. The two output streams are in equilibrium and exit the reboiler at 130 oC. Determine the temperature of the feed stream. Neglect the effect of pressure and consider the following additional data:

SELECT ALL THAT OCCURS WHEN THE REBOIL RATE IS INCREASED.

A) THE BOTTOMS FLOW RATE IS INCREASED;

B) THE DISTILLATE CONCENTRATION IN THE BOTTOMS DISCHARGE IS INCREASED;

C) THE COLUMN TEMPERATURE IS INCREASED;

D) THE NUMBER OF THEORETICAL PLATES INCREASES IN A PACKED COLUMN;

SELECT ALL THAT OCCURS WHEN THE REFLUX RATE IS INCREASED.

A) THE OVERHEADS DISTILLATE RATE IS INCREASED;

B) THE OVERHEADS DISTILLATE PURITY IS INCREASED;

C) THE COLUMN TEMPERATURE IS INCREASED;

D) THE NUMBER OF THEORETICAL PLATES INCREASES IN A PACKED COLUMN;

Repeat the procedure from Part C for the other three oxides,

then rank all four oxides according to their enthalpy of reduction.

Rank from greatest (most positive) to least enthalpy of reduction. To rank items as equivalent, overlap them.

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during a steady flow process a mixture of 8 kmol of N2 and 2 kmol of O2 is heated from 200 K to 250 K at a constant pressure of 12 MPa. determine the heat transfer during this process using 1- the ideal gas approximation 2- kay's rule