Science & Mathematics - 29 November 2007

im really confused on how to do this problem. its says- there are four consecutive odd integers. the sum of the first and the second numbers is 96. what are the integers?

im pretty sure you have to do let statements. so i made four.
let x+2=1st number
let x+4=2nd number
let x+6=3rd number
let x+8= 4th number

it says odd integers, and im pretty sure i remember learning that odd integers were the same as even integers. correct me if im wrong.

but then it says the sum of the first and second. which i can do

x+2+x+4=26

but i dont understand how doing that problem can help you figure out all four of the integers. does anyone know?

2007-11-29 13:35:32 · 3 answers · asked by Anonymous in Mathematics

How many moles of oxygen (O2) must be placed in a container with a volume of 50.0 liters to produce a pressure of 4.50 atm at standard temperature? (Points: 1)
32 mol
7.5 mol
10.0 mol
28.0 mol


2. A sample of gas measures 3.50 liters at 273 K. At what temperature will its volume become 4.50 liters, assuming pressure remains constant? (Points: 1)
212 K
173 K
351 K
cannot be determined


3. A 5.0 liter tank of oxygen gas is at a pressure of 3.0 atm. What volume will be available if the oxygen is used at the normal atmospheric pressure of 1.0 atm? (Points: 1)
.6 liters
15.0 liters
1.67 liters
cannot be determined


4. What would happen to the pressure of a sample of gas if it were moved from sea level to 6.0 km above sea level? (Points: 1)
the pressure would stay the same
the pressure would be halved
the pressure would be doubled
the pressure would be tripled


5. R, the gas constant in the ideal gas equation, has a numerical value of 0.0821, what are the units? (Points: 1)
atm-liter/mol-K
atm-m3/mol-K
Pa-m3/mol-K
Pa-liter/mol-K


6. The most useful unit for describing the amount of gas is the: (Points: 1)
liter
cubic meter
mole
atmosphere


7. The temperature scale that has absolute zero as its zero point is the: (Points: 1)
Celsius scale
Kelvin scale
Rankin scale
Fahrenheit scale


8. The characteristics/variables of gases needed to describe a gas completely include all of the following except: (Points: 1)
pressure
temperature
density
volume


9. The ability of gas to spread rapidly through other gases is explained by: (Points: 1)
frequent inelastic collisions of the particles
the high density of gases
the high temperature of gases
constant random motion of particles


10. Collisions of gas particles in which no energy of motion is lost are called: (Points: 1)
perfectly elastic
mostly elastic
both elastic and inelastic
inelastic


11. Raising the temperature of a gas in a fixed volume container will most likely change the: (Points: 1)
number of particles in the container
density of the gas in the container
pressure exerted by the gas in the container
size of the gas particles in the container


12. Which of the following is not a property of gases? (Points: 1)
Gases can be compressed into smaller spaces
Gases diffuse throughout other gases
Gases exert pressure on objects
Gases are weightless near the surface of the Earth


13. Represented by “R” used in the ideal gas equation: (Points: 1)
ion
electronegativity
cathode ray
gas constant


14. What is the density (g / L) of CO2 at 25oC, 1.8 atm ? (R=.0821 L atm / K mol)? (Points: 1)
12.5
3.2
5.9
.088


15. How much faster is He gas than CO2? (Points: 1)
3.3
5.5
11.3
15.4


16. Real gases exist at: (Points: 1)
high temperature, high pressure
low temperature, low pressure
low temperature, high pressure
absolute zero


17. Which of the following is not part of the kinetic molecular theory? (Points: 1)
The higher the pressure of a gas, the higher the speed.
The lower the temperature of a gas the lower the speed.
Attractions between gas molecules are negligible.
The energy between gas molecules collisions are conserved.


18. How many moles of an ideal gas exist at 2.0 atm, 195 L, 25 oC ? (R = .0821 L atm / K mol )? (Points: 1)
2.0
4.0
16.0
32.0


19. Convert 250. ml of a gas at 25 oC, and 845 mm Hg to STP. (Points: 1)
255 mL
355 mL
455 mL
555 mL


20. As the pressure of a gas increases at constant temperature, the volume: (Points: 1)
stays the same
increases
varies up and down
decreases

2007-11-29 13:34:48 · 3 answers · asked by whf 2 in Chemistry

math,

2007-11-29 13:34:14 · 1 answers · asked by amira b 1 in Mathematics

it on a project.
click this link.
http://s110.photobucket.com/albums/n105/SoccerChika78/?action=view¤t=2003492495655514596_rs.jpg

2007-11-29 13:33:56 · 2 answers · asked by soccerchika78 1 in Mathematics

2007-11-29 13:33:29 · 1 answers · asked by Anonymous in Chemistry

2007-11-29 13:33:09 · 1 answers · asked by fez 4 in Earth Sciences & Geology

For testing the water from the ion-exchange resin, you used 1 to 3 ml of water, instead of 5mL of water. How can you directly compare the number of drops needed for permanent suds when you use a different volume of water?

2007-11-29 13:33:01 · 1 answers · asked by snailtrail 1 in Chemistry

Scientists used to think of plants as generally defenseless against herbivores. Research now shows that plants use a complex variety of chemical defenses. When a tomato, potato, or alfalfa leaf is wounded by a chewing insect or by other mechanical means, a chemical message travels rapidly throughout the plant. In response to this message, the plant produces and accumulates substances that inhibit digestion in the alimentary canal of the animal that eats the leaf. These wound-induced molecules function as inhibitors of trypsin, one type of enzyme involved in protein digestion.

In laboratory experiments, these wound-induced inhibitors had serious effects on animals. Because they could not break down ingested protein, chicks fed the inhibitors died, and rats and mice became malnourished. The growth period of insect larvae was prolonged, allowing diseases and predators to kill a greater number of the larvae.

See more below!

2007-11-29 13:31:44 · 1 answers · asked by katiekcat5 3 in Botany

like the one johnstown when it flood. need to know where, why it was built, when and how it was used.

2007-11-29 13:31:22 · 1 answers · asked by Anonymous in Engineering

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2007-11-29 13:28:32 · 3 answers · asked by snailtrail 1 in Chemistry

please help me on my math homework

2007-11-29 13:28:26 · 3 answers · asked by Anonymous in Mathematics

Ok, my birthday is on Dec. 2nd, 1991, and I just wanted the weather records for that day. I lived near Columbus or Norfolk Nebraska. All I've been able to find were the record highs, and the record lows for the day. not the actual day I was looking for.

Thanks in advance!

2007-11-29 13:26:27 · 10 answers · asked by Anonymous in Weather

The oldest Babylonian texts on medicine date back to the First Babylonian Dynasty in the first half of the 2nd millenium BC. The most extensive Babylonian medical text, however, is the Diagnostic Handbook written by the physician Esagil-kin-apli of Borsippa,[9] during the reign of the Babylonian king Adad-apla-iddina (1069-1046 BC).[10]

Along with contemporary ancient Egyptian medicine, the Babylonians introduced the concepts of diagnosis, prognosis, physical examination, and prescriptions. In addition, the Diagnostic Handbook introduced the methods of therapy and aetiology and the use of empiricism, logic and rationality in diagnosis, prognosis and therapy. The text contains a list of medical symptoms and often detailed empirical observations along with logical rules used in combining observed symptoms on the body of a patient with its diagnosis and prognosis.[11]

The symptoms and diseases of a patient were treated through therapeutic means such as bandages, creams and pills. If a patient could not be cured physically, the Babylonian physicians often relied on exorcism to cleanse the patient from any curses. Esagil-kin-apli's Diagnostic Handbook was based on a logical set of axioms and assumptions, including the modern view that through the examination and inspection of the symptoms of a patient, it is possible to determine the patient's disease, its aetiology and future development, and the chances of the patient's recovery.[9]

Esagil-kin-apli discovered a variety of illnesses and diseases and described their symptoms in his Diagnostic Handbook. These include the symptoms for many varieties of epilepsy and related ailments along with their diagnosis and prognosis.[12]

2007-11-29 13:21:39 · 1 answers · asked by Anonymous in Medicine

describe the path of nitrogen through its biogeochemical cycle. PLease help. i need awnsers

2007-11-29 13:21:35 · 2 answers · asked by jodles 1 in Biology

Assume an owl eats fifty 1g insects and one 100g rat. In terms of biomass, did the insects or rat contribute the most to the owls diet? How does foraging affect this? Is quality or quantity of prey more important?

If you could help me out with any of these, or give some links to any helpful sites, that would be awesome :]]]

2007-11-29 13:21:09 · 2 answers · asked by Anonymous in Zoology

please show work for best answer!!!

2007-11-29 13:20:31 · 3 answers · asked by Yeah Mer 2 in Mathematics

The smallest detail visible through Earth-based telescopes is about 1 second of arc in diameter. What size is this on the moon?
What size in km?

2007-11-29 13:18:42 · 6 answers · asked by Anonymous in Astronomy & Space

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A. California
B. Montana
C. Pennsylvania
D. West Virginia

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A concert is givin in pittsburgh alex and mary want to go to the concert. The first 50 miles of their trip was posted at 35mph. The next 100 miles is posted at 55mph. The last 50 miles was posted at 40 mph. If they leave their house at 4 pm, will they make the concert by 8 pm? please show work!

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2007-11-29 13:08:49 · 2 answers · asked by Gruntled Employee 6 in Physics

Like this one> 4+8/3+16/9+32/27+.....
or this one> -60+20-20/3+..... ?
Thank you.

2007-11-29 13:08:16 · 5 answers · asked by Anonymous in Mathematics

An astronaut is golfing on the moon, which has gravity of 1.63m/s^2 down. If he hit the ball and it left the tee with an initial velocity of 15m/s at an angle of 26 degrees, how much time does the ball spend in the air? How far does the ball travel from the tee?

2007-11-29 13:08:03 · 1 answers · asked by Keytosuccess 1 in Physics

i am donating blood tomorrow at a school blood drive.
anything i should know?

2007-11-29 13:06:13 · 10 answers · asked by Anonymous in Medicine

3x2 + 8x + 5

2007-11-29 13:05:56 · 2 answers · asked by emando16 2 in Mathematics