100 moles of a mixture containing 45.9 wt% methane and remainder propane are burned with 40% excess oxygen. There is 80% conversion of both methane and propane. Given MWs: CH4= 16, C3H8= 44, O2= 32, H2O = 18, CO2= 44

a) Balance the following reactions:____ CH4 + ____ O2 -->____ CO2+ ____ H2O

____ C3H8 + ____ O2--->____ CO2 + ____ H2O (I understand this and have it correct)

b) How many moles of O2 must be supplied for 80% conversion of both methane and propane?

c) What is the exit composition of the combustion reactor in mole percents?

PLEASE SHOW ALL WORK LEADING TO ALL CALCULATED VALUES

Control of imports of dual-use toxic chemicals - what could be the shortcomings and weaknesses in an existing regulatory framework in the control of toxic chemicals?

An ammonia heat engine has the following reversible steps:

1 ? 2 Isothermal heating of saturated liquid @ 60°C to superheated vapor

2 ? 3 Adiabatic expansion to saturated vapor at -20°C

3 ? 4 Isothermal cooling to a 2 phase fluid

4 ? 1 Adiabatic compression back to state 1

Find QH (in kJ/kg). Use the correct sign convention to indicate the direction of heat. Hint: build a T-S diagram of the whole cycle first.

how can state parties to the CWC (chemical weapons convention) ensure that all stakeholders, including the employees of customs, border-control and law enforcement authorities, are well aware of the requirements under the chemical weapons convention and of the crucial role they each play in the maintenance of regional and national security, given the emerging threat posed by non-state actors?

Describe the following:
(1) Efects of natural convection at heat exchanger
(2) Frank's laws and color temperature
(3) Geometric factor and overall interchange factor
(4) Factors Affecting Evaporator Capacity

write 1 page about Global warming.

How do I know that steam distillation finished?

a. I) describe how microorganisms transform nitrogen during wastewater treatment ii? give examples of the microorganism(species, functional groups) involved in nitrogen transformation reaction

Ammonia gas is being absorbed by water in a wetted-wall column. At one level of the column, the following data applies: 
gas-phase mass transfer coefficient 5.22 × 10–9 kmol m–2 s–1 Pa–1 
liquid-phase mass transfer coefficient 3.88 × 10–5 m s–1 
Henry's constant 0.955 kPa (kmol m–3)–1. mole fraction of ammonia in liquid* 1.351 × 10–3 mole fraction of ammonia in gas* 0.065 
total pressure of system 1.013 bar 
mole mass of ammonia 17 
*Note: these values will need to be converted to concentrations in kmol m–3.

(a) What is the partial pressure of the ammonia gas at the gas/liquid interface?

(b) What is the molar concentration of the ammonia in the liquid at the interface?

A piece of equipment having a negligible salvage and scrap value if estimated to have a MACRS and straight line recovery period of 5 years. The original cost of ther equipment was $500,000. Determin the depreciation charge of the euipment for the second yeqr if straight line depreciation is used and the percentage of the original investment paid off in the first 2 years.

Compare the differences in viscosity and density of water (SG = 1) and gasoline (SG = 0.803). Determine the pressure at the bottom of a 8m high tank that is filled with water, and compare it to the pressure at the bottom if the tank is filled with gasoline. Calculate the volumetric and mass flow rates of the two fluids in a 0.10m diameter pipe moving at a velocity of 4.2 m/s.

a) Give examples of 2 different biomonitoring approaches that could be used to assess the toxicity of a water source b) Define what WET tests are and how you wold apply them for the biomonitoring of a water body c) Discuss the difference between the olfactory and chemical analysis for the assessment of odorous emissions

Water treatment plants are increasingly employing online turbidity monitoring a) Explain why turbidity monitoring can be an important measurement form a public health perspective b) How would you use the results of online turbidity monitoring to help ensure safe drinking water quality?

1) What characteristics of a compound lead to solubility in water? Name as many as you can and explain them.
2) What characteristics of a compound lead to insolubility in water? Name as many as you can and explain them.
3) Are ionic compounds (anions or carboxylic acids or ammonium salts of amines) more or less soluble in water that the corresponding neutral compound? Explain.
4) Some of the most important functional groups in organic chemistry are alkane (actually a lack of other functional groups), alcohol, phenol, ether, amine, ketone, carboxylic acid, ester, and amide. Draw a simple example of each of these and show how it hydrogen bonds with water. If it can't hydrogen bond, so state.
5) Which of the functional groups listed in Question 4 is an acid in water (i.e., would be more soluble in base)? Which of them can be a base (i.e., would be more soluble in acid)?