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Science & Mathematics - 14 November 2006

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2006-11-14 05:29:03 · 8 answers · asked by Jeff P 1 in Chemistry

A sample of nitrogen gas was collected over water at 20.°C and a total pressure of 1.50 atm. A total volume of 2.20 102 mL was collected. What mass of nitrogen was collected? (At 20.°C the vapor pressure of water is 17.5 torr.)
i got 0.003766grams
why i am wrong

2006-11-14 05:27:46 · 1 answers · asked by smile 1 in Physics

Please explain step by step…………..I’m really confused.

x^-2.5=.636

2006-11-14 05:26:58 · 7 answers · asked by refuse2lose_2006 3 in Mathematics

5

how do I make a cold fusion rector, my electric is getting way too expensive, I could keep it in my shed right?

2006-11-14 05:25:10 · 7 answers · asked by SCOTT B 4 in Physics

I know that the 1st energy level takes 2 electrons , the 2nd 8 , 18, 32 and so on....but why does the 3rd level only take 8 and not 18

ie Ca : 2,8,8,2 why not 2,8,10 ??

2006-11-14 05:25:03 · 1 answers · asked by Anonymous in Chemistry

job opportunities in this field.

2006-11-14 05:24:41 · 3 answers · asked by anshu 1 in Botany

chemistry

2006-11-14 05:21:21 · 5 answers · asked by Anonymous in Chemistry

Explain what methods and how it is accomplished.

2006-11-14 05:21:21 · 5 answers · asked by lisa m 1 in Biology

Imagine that there is something in space "x" amount of distance from the sun. At what speed or acceleration would the object travel towards the sun due to its gravity. Like wise, if the same object was the same distance from Mercury at what speed or acceleration would it travel towards Mercury due to its gravity. need this for all the planets and the sun.

I am making an interactive model of the solar system and I need to know the gravity values of all the planets and the sun.

If it is easier, I would love to know the actual gravity values of all the planets and the sun.

2006-11-14 05:20:36 · 3 answers · asked by dragon_maker123 2 in Physics

microcontroller

2006-11-14 05:20:30 · 3 answers · asked by king of the ring 1 in Engineering

... and the same question about SO(4)/SO(2)xSO(2).

How can one visualize the manifold O(4)/O(2)xO(2) in terms of spheres?

What about the second homotopy group of
O(2N)/O(N)xO(N) for N>2?

Where can I read about homotopy groups of Grassmannians?

2006-11-14 05:18:35 · 1 answers · asked by iakkerman 1 in Mathematics

I find very little math describing the formation of the singularity. If a singularity is formed does it have an infinite distance. Could it for example reach earth. It seems this singularity is fiction.

2006-11-14 05:17:20 · 4 answers · asked by Anonymous in Astronomy & Space

2006-11-14 05:16:56 · 11 answers · asked by cc 1 in Mathematics

2006-11-14 05:16:30 · 4 answers · asked by dreamer 1 in Chemistry

2006-11-14 05:15:25 · 6 answers · asked by BOO! 2 in Astronomy & Space

2006-11-14 05:14:43 · 3 answers · asked by Mark L 1 in Physics

2006-11-14 05:14:41 · 2 answers · asked by dreamer 1 in Botany

2006-11-14 05:14:04 · 2 answers · asked by Mark L 1 in Physics

2006-11-14 05:12:49 · 1 answers · asked by Mark L 1 in Physics

During a demonstration of the operation of a passenger chemical oxygen generator the panel was manually opened and the masks deployed. The lanyard was pulled but no oxygen flowed from the hose to the face masks? Can anyone diagnose possible faults in this scenario?? Thanks

2006-11-14 05:12:25 · 3 answers · asked by fanta m 1 in Engineering

2006-11-14 05:12:19 · 3 answers · asked by goring 6 in Chemistry

In order to retire on time, you need to begin investing money. Experts say that a good investment will double in value every seven years.

Which of the following would you use to calculate the value of your investment?

a) arthmetic sequence
b) conjecture
c) geometric sequence
d) inductive reasoning

2006-11-14 05:11:21 · 3 answers · asked by Anonymous in Mathematics

How does hydrostatic equilibrium regulate the sun's temperature if it has a "fever" (that is produces too much fusion energy)?

2006-11-14 05:11:17 · 1 answers · asked by hunnk33 1 in Astronomy & Space

i have to learn and remember all the major bones, veins, arteries, and the origins and insertions of all the muscles.... what is the best way to remember all of this?

2006-11-14 05:10:29 · 4 answers · asked by trackstud610 2 in Biology

2006-11-14 05:10:22 · 10 answers · asked by rambobob 1 in Other - Science

Metallic molybdenum can be produced from the mineral molybdenite, MoS2. The mineral is first oxidized in air to molybdenum trioxide and sulfur dioxide. Molybdenum trioxide is then reduced to metallic molybdenum using hydrogen gas. The balanced equations are given below.
MoS2(s) + 7/2 O2(g) MoO3(s) + 2 SO2(g)
MoO3(s) + 3 H2(g) Mo(s) + 3 H2O(s)

Calculate the volumes of air and hydrogen gas at 21°C and 1.00 atm that are necessary to produce 1.00 103 kg of pure molybdenum from MoS2. Assume air contains 21% oxygen by volume and assume 100% yield for each reaction
what is the volume in L of air and Hydrogen?
please explain

2006-11-14 05:10:06 · 1 answers · asked by smile 1 in Chemistry

I live on the California central coast and a friend gave me one of the many little trees that pop up from tree's bean-like seeds.
My tree is now over 8 feet tall and wide after 2 years. The blossoms are 5-petal school bus yellow about 1.5" and in cooler weather the whole tree is covered with hundreds. The blooms are in clusters of about 20. The dark green leaves
are like on locusts trees, only smaller, in strands opposite each other. The strands are 3" long. The beans, 1/2" across, 5" long, drop off in fall.
The tree architecture is open. It seems full from a distance but upclose it is easy to see right thru the tree. The branches a warm gray, very slim and when loaded with blooms tend to droop a bit.
I tried our county extension service, and looked at hundreds of photos online. It must be a native tree because plant/seed companies don't seem to have it. The stamen is green and about inch long.
My friend calls it the "popcorn tree" but it looks nothing like what I find online

2006-11-14 05:08:59 · 4 answers · asked by Everyman 3 in Botany

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