Science Papers Help Online

A cylinder is filled with 10.0L of gas and a piston is put into it. The initial pressure of the gas is measured to be 295.kPa.

The piston is now pushed down, compressing the gas, until the gas has a final volume of 

5.90L

. Calculate the final pressure of the gas. Be sure your answer has the correct number of significant digits.

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Give your best environmental interpretation (geographic setting, climate, deposition environment) for the following: Medium-grained sandstone containing fragments of tree trunks, branches, and leaves

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How would you solve a problem like this?

For the reaction system, 2SO2(g) + O2 <——–> 2SO3, Kc has a value of 4.62 at 450 Kelvin. A system, at equilibrium, was found to contain 0.360 moles of SO2 and 0.900 moles of O2 in a 3.00 liter container. Calculate the number of moles of SO3 gas at equilibrium. 

a. 0.166 M

b. 0.734 M

c. 0.539 M

d. 0.424 M

e. 0.141 M

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Restriction Endonucleases- Cutting & Mapping DNA. The length of each fragments from XhoI / Hind III double digest , the XhoI single digest was estimated by using the result of hind III single digest which were known.

I wanted to

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The limiting current of lead in an unknown solutions is 5.60μA. one mL of a 1.00 x 10-3M lead solution is added to 10.0mL of the unknown solution and the limiting current of the lead is increased to 12.2μA.What is the concentration of lead in an unknown solution

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Hello, I need help with this asap, within a half an hour if possible please. Compute the relative frequencies for students who earned a C shown in the table of grades below:

Grades                Number of Students

A

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A banked circular highway curve is designed for traffic moving at 63 km/h. The radius of the curve is 199 m. Traffic is moving along the highway at 48 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?

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I chose Eastern U.S cougar due in 5 days, would like to work on this project too? if yes, ill post it for you and tell me the price

INDEPENDENT PROJECT- An Endangered species in the United States (or New York State)

Each student will be required to select a species of organism (plant or animal) that is listed as being endangered in either the United States (as a whole) or in New York State. Each student will research the organism and submit a powerpoint presentation that includes the following:

1)The organism’s classification (scientific) and brief description of the organism’s ecology

2)The species’ historical range/distribution(where was it found before it bacame endangered)

3)The species’ current range/distribution(where is it found today)

4)The cause(s) for the species’ decline

5)The current population estimate in the United States/ NYS (whichever is applicable)

6)The history behind when the species was listed as endangered

7)The species recovery plan as it stands

8)The future status of the species – projections for the future

9)Any other information that might be pertinent regarding the species

10)References used

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Atomic Number of protons in nucleus of each atom of an element Neutral atom, number of protons = number of electrons What are the chemical symbol and atomic number of Silicon? Radium? Gold? Carbon? What is the chemical symbol and how many protons and electrons do Fluorine, Antimony, Tungsten, and Mercury have? Number of protons + neutrons in nucleus of each atom of an element H (Tritium) How many protons, electrons, and neutrons does Hydrogen have? Deuterium? Tritium? What is the chemical symbol and representation of Neon20? Xenon-132? How many protons, electrons, and neutrons do each have? Monatomic, Diatomic, Polyatomic, etc. Compound-made of two or more elements Question: Are all molecules compounds and all compounds molecules? Why or why not?

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(b) What year does CFC_trop peak? CFC_strat peak? And O3_strat reach a minimum?

(c) What is the maximum ozone depletion relative to a CFC-free atmosphere (give your answer in %)

(d) Suppose that we wanted to keep ozone depletion to 5% or less.  What value of O3_strat does this correspond to?  And how many years after starting production would we have had to realize our mistake, trusted the science and acted to phaseout all CFCs?

(e) How long would it take since starting to emit CFCs for the ozone to recover to the 99% level?

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