What are Malala's leadership qualities?

Folds are possible at which of the following 5 plate boundaries? More than one answer is possible!

Group of answer choices

A. C-C Divergent

B.O-C Convergent

C. O-O Transform

D. O-O convergent

E. C-C Convergent

The death rate per 100,000 for lung cancer is 7 among non-smokers and 71 among smokers. The death rate per 100,000 for coronary thrombosis is 422 among non-smokers and 599 among smokers. The prevalence of smoking in the population is 55%. Among smokers, the etiologic fraction of disease due to smoking is:

A.

cannot be determined from the information provided.

B.

0.90 for lung cancer and 0.88 for coronary thrombosis.

C.

0.90 for lung cancer and 0.29 for coronary thrombosis.

D.

0.89 for lung cancer and 0.88 for coronary thrombosis.

E.

0.89 for lung cancer and 0.29 for coronary thrombosis.

CO(g)+H20(g) <---> CO2(g)+H2(g) delta h =-9

Use le chateliers principal to predict the effects on the equilibrium

CO2 added

Temp increased

Pressure increased

Catalyst removed

H2o removed

what is the difference between selenderness ratio in horizontal and vertical separator ?

Discuss with the aid of diagrams any three (3) particle size reduction equipment?

Given the observed longwave radiation (incoming and outgoing) and the observed shortwave radiation (incoming and outgoing) how would you calculate the observed albedo?

A cross-country pipeline transports crude oil at a rate of 500,000 barrels per day. The pressure of the oil leaving Pumping Station A is 500 psig. The pressure at the inlet of Pumping Station B is 75 psig. Station B is at an elevation 157 feet higher than Station A. Given the crude oil density is 48.0 lbm/ft3 and one barrel is equivalent to 42 gallons, determine (a) the work loss (ft∙lbf /lbm) between A and B and (b) the equivalent power consumed in the process (horsepower).

Fluid Mechanics

A vapor mixture of -butane (B) and -heptane (H) contains 40.0 mole% butane at 80°C enters a condenser at a rate 4 kg/s. Liquid and vapor product streams emerge from the process in equilibrium at 40◦C. The vapor product has a 45.0 mole% butane composition. Determine: a. The pressure in the condenser b. The composition and flowrate (mol/s) of the liquid stream c. During operation, the system contains a 3m depth of the liquid phase (S.G. = 1.41) at any given time. If the maximum pressure the vessel floor joints can handle is 1 bar, will the tank rupture?

1) 10000 lb/h of a 40.00% NaoH solution is crystallized through a combined evaporator-crystallizer process. The feed enters an evaporator which concentrates it to 50.00% NaOH. The concentrated solution then enters the crystallizer with a built in filter. The crystal product is 95% NaOH crystals with the remaining 5% as adhering mother liquor solution. The mother liquor, containing 45.00% NaOH, is mixed back to the feed before entering the evaporator. Determine the recycle flow rate.

2) Resolve the problem, now considering if the mother liquor is not recycled, but the entire process still generates the same amount of product (crystals) as the original problem. Retain all concentrations given. Determine the amount of feed needed if the recycle stream was removed. Compare the recovery ratio (lb NaOH recovered as crystals/lb NaOH in feed) for the two cases to see the importance of the recycle stream.

Questions:

1. The densities of ice and water at 0 °C are 0.9168 and 0.9998 g cm–3,respectively. If ∆H for the fusion process at atmospheric pressure is 6.025 kJmol–1,

   1. What is ∆U?

   2. How much work is done on the system?

2. For each of the following processes, state which of the quantities ∆U, ∆H, and ∆S are equal to zero. Explain with logical reasoning.

   1. Isothermal reversible expansion of an ideal gas.

   2. Adiabatic expansion of an ideal gas through a throttling valve.

   3. Vaporization of liquid water at 80 °C and 1 bar pressure.

   4. Reaction between H2SO4 and NaOH in dilute aqueous solution at constant temperature and pressure.

A 75 mL sample of water was placed in a 300 mL BOD bottle, and dilution water was added to fill the bottle. The initial DO concentration was 8.28 mg/L. The DO reading after 5 days was 4.56 mg/L and after 8 days was 3.59 mg/L.

Determine the reaction constant (k) - a trial-and-error solution needed Determine BODu

Monochlorobenzene (C6H5Cl) is produced commercially by the direct catalytic chlorination of benzene (C6H6). In the process, dichlorobenzene(C6H4Cl2) is generated as a coproduct.

?6?6 + ??2 → ?6?5?? + ??? ?6?5?? + ??2 → ?6?4??2 + ???

Given that the molar ratio of benzene to chlorine in the feed is 5 to 1; and the feed contains only benzene and chlorine. Chlorine is the limiting reactant and completely consumed in the reaction. The fractional yield of C6H5Cl is 0.875

. a. Take a basis of 100 mol C6H5Cl produced, draw and label a flowchart. Do a degree of freedom analysis based on atomic species balances.

b. Calculate the amount of feed and product components of the reactor using the atomic species balances. Present the calculated values in a table to prove that the total mass to the reactor is equal to the total mass out from the reactor (mass conservation).

c. Calculate the percentage conversion of C6H6. The value that you have calculated should be low. Why do you think the reactor would be designed for low conversion? What additional processing steps are likely to take place downstream of the reactor in order to improve the conversion?

111 m³/min of hydrogen measured at normal conditions and nitrogen at a 300% excess enter an isobaric reactor. The inlet gases at 490°C are reacted in the presence of a catalyst to synthesize ammonia. The process has an efficiency of 33%. The exhaust gases are cooled to -40°C to condense the ammonia. Assume that the Cp of the gas phase species can be used in the temperature range, and that Cp NH3 (l) = 0.071938 kJ/mol K. Calculate the overall heat flow of the system in kW.