1. Calculate the mass fraction stochiometric ratio for the combustion of

n-Butane (C₄H₁₀) in air ( 20% v/v O₂   80% v/v N₂)* ratio 4:1.

Given the following Atomic Weights for the elements and their valencies.*

Element            Symbol         Atomic Weight           Valency

Hydrogen              H                          1                             1

Carbon                  C                         12                            4

Nitrogen                N                         14                            3

Oxygen                  O                         16                            2

*Note these numbers have been rounded for ease of calculation.

Florida has a host of issues relating to water. Do a bit of research, and discuss one of these issues. Include your chosen problem and any contributing factors and possible solutions.

Some possible topics include:

• Ground water depletion
• Everglades restoration
• Salt water intrusion
• Urban runoff
• Agricultural runoff
• Ground water contamination.

Assume that the difference in temperature between a condenser and a evaporator decreases. How will the volumetric efficiency of the cooling compressor be affected by this. Show this by describing it in a pv diagram.

1. acid precipitation

• what, its cause and impacts?
• Effects of Acid deposition: Forest, aquatic Ecosystem
• Neutralizing capacity
• Control Strategies
• Increasing fuel efficiency

2. municipal solid waste

• What, how much, and their fate?
• Past practices for MSW
• Siting: Public concerns
• Combustion-A waste reduction process
• Primary and secondary Recycling

Please write 2 paragraphs for the following topics containing these elements

Explain the principle of Differential scanning calorimetry (DSC) and its applications in polymer analysis.

You are given task to design an experiment to convert 1 kg of water in ice phase at 253 K and 100 kPa into vapor instantaneously.

1.  List down possible assumptions (with justification) to ease your experimental setup idea.

2. Sketch a schematic diagram of your experimental setup

3. Construct one experiment method (with step by step methodology) based on the collected diagram and selected apparatus and items used.

The atmosphere slowly oxidizes hydrocarbons in a number of steps that eventually convert the hydrocarbon into CO2 and H2O. The overall reaction is shown below: CH4 (g) + 5 O2 (g) + 5 NO (g)  CO2 (g) + H2O (g) + 5 NO2 (g) + 2 OH (g) Suppose that an atmospheric chemist combines 155 mL of CH4, 885 mL of O2, and 55.5 mL of NO all at STP in a 2.0 L flask. The flask is allowed to stand for several weeks at 275 K. if the reaction reaches 90% completion (90% of the limiting reactant is consumed):

Calculate the moles of CO2 and NO2 formed and their partial pressures, respectively? please show all work

how are genes governed by the environment?

Cloning is neither governed by the environment or genes?

Who bears the most responsibility for beginning the Franco-Prussian War: Louis Napoleon or Otto von Bismarck? Please EXPLAIN. Also, regardless of who you decide bears the most responsibility for beginning the Franco-Prussian War also decide whether French or German nationalism profited more from this war in the long run. PLEASE EXPLAIN.

I am looking for a formula where I can find the relative humidity (RH) of air after being compressed. I am given the RH, input and output temperature, and input and output pressure. It is assumed that the compressed air is hotter after compression, using constant volume ideal gas law. Any help appreciated.

Read the summaries and analyses of both sides about the Cape Wind project. If the decision was in your hands, would you approve the project? Why or why not? Do you believe this level of controversy is unique to Cape Wind, or is it a preview of the challenges future wind projects will face?

3. The water-gas shift reaction (CO + H­₂O à CO₂ + H_­2) occurs in a series of two reactors. An equimolar mixture of steam and CO (stream 1) enters the first reactor. The product stream from the first reactor (stream 3) and an additional stream (stream 3) containing pure steam enter the second reactor. The fractional conversion of CO in the first reactor is 0.610, and the fractional conversion of CO in the second reactor is 0.790. The product stream has a water (steam) mole fraction of 0.210.

1. Draw and fully label a PFD for the process.
2. What is the fractional conversion of CO for the overall process?
3. What is the ratio of the molar flow rate of stream 2 relative to the molar flow rate of stream 1?
4. Put a box around the answers to the questions in b. and c. You will receive 5 points for answering with the correct number of significant digits.

Explain what is scientific about the study of evolution. ( HintThink about the definition of evolution and how you would apply the steps of the scientific method .)

1. (1 Point) A sample of soils was taken by using the sand cone method. The sample was placed inside a sealed jar and the total weight jar + sample was 3.08 lbs. The empty jar had weighted 0.75 lbs. before collecting the sample. After collecting the sample, the cone and the calibrated sand bottle were placed on the plate. The sand being used was calibrated in advance and it was determined its relative density was 2.55. The density of water is 62.4 lbs./ft3. The sand was allowed to fill the excavation hole as well as the plate and cone assembly, after which the valve was closed. The calibrated sand bottle weighted 6.25 lbs. before and 3.79 lbs. after being used. During calibration at the lab, it was found that the weight of sand left inside the cone and plate assembly was 0.51 lbs. Using the “Sand Cone test Form.pdf” file provided as a template complete all the necessary calculation to estimate the volume of the excavated hole. Remember that the density of sand can be calculated by multiplying its relative density by the density of water. Please document all your calculations below the given table.

2. (1 Point) Why are Organic soils unstable for foundation support? Please explain with enough detail for the different kinds of organic soil.