Science & Mathematics - 14 February 2007

2007-02-14 01:27:09 · 6 answers · asked by trauma53 2 in Mathematics

2007-02-14 01:27:02 · 6 answers · asked by Captain705 1 in Mathematics

Find the partial pressures, total pressure, and mole fractions of a gas mixture in a 4.00 L container at 375 oC if it contains 1.90 g each of Ar, CO and CH4.

A) What is the total pressure (in atm)?
B) What is the partial pressure (in atm) of Ar.
C) What is the mole fraction of Ar?
D) What is the partial pressure of CO (in atm)?
E) What is the mole fraction of CO
F) What is the partial pressure (in atm) of CH4.
G) What is the mole fraction of CH4?

2007-02-14 01:26:13 · 1 answers · asked by BettyBoo 1 in Chemistry

2007-02-14 01:24:10 · 12 answers · asked by Ben M 2 in Zoology

solar panels directly faces sun so they can receive more energy than when it is at horizontal. But in cloudy weather, the solar panels receieve more energy when it is at horizotal. why is it so?

2007-02-14 01:20:07 · 3 answers · asked by ?ټ֠? size= 1 in Physics

2007-02-14 01:19:38 · 11 answers · asked by CAROL S 1 in Mathematics

2007-02-14 01:18:08 · 1 answers · asked by Anonymous in Other - Science

A pressurized can of whipping cream has an internal pressure of 1.05 atm at 25.0 oC. If it is placed in a freezer at -15.0 oC, what is the new value for its internal pressure (in atm)?

2007-02-14 01:16:23 · 1 answers · asked by BettyBoo 1 in Chemistry

2007-02-14 01:15:41 · 6 answers · asked by Tony G 1 in Botany

Rearrange the ideal gas equation (PV=nRT) to give the following expressions:
Keep in mind that the formula is interpreted from left to right with operations in parentheses done first. Add parentheses if needed.
A) n = ?
Equation:
B) An equation that relates V and n when P and T are constant. Give the expression involving V and n which is equal to a constant. There are two equivalent answers, one the reciprocal of the other. Choose the answer with V in the numerator.
Equation:
C) n/V = ?
Equation:

2007-02-14 01:15:26 · 5 answers · asked by BettyBoo 1 in Physics

If you were given a chart that was in the form:
x: 1| 2| 3| 4| 5| 6| 7|
y: 4.1|4.2|4.4|4.6|4.7|5.0|5.2

what would be the correlation?
the options are -0.9, -0.3, 0.3 and 0.9.
How would you figure this out?
THANKS

2007-02-14 01:14:16 · 2 answers · asked by Besch 4 in Mathematics

Convert the following to torr.
[1 atm = 760. torr], [1 atm = 1.013E5 Pa].

A) 1.00 Pa
B) 125 kPa
C) 70.8 atm
D) 1.83E-10 atm

2007-02-14 01:13:51 · 3 answers · asked by BettyBoo 1 in Physics

I LOVE PANDASS!!!!!! :)

2007-02-14 01:12:29 · 6 answers · asked by Anonymous in Zoology

how can dry matter be used in the discussion of plant function in general and in particular for plant exposed to environmental stresses?

2007-02-14 01:11:36 · 2 answers · asked by kasih 1 in Botany

Calculate the most probable speed and average kinetic energy per mole for each of the following.

1. most probable speed of Ar at 122 oC
m/s
2. average kinetic energy per mole of Ar at 122 oC
J/mol
3. most probable speed of Xe at 122 oC
m/s
4. average kinetic energy per mole of Xe at 122 oC
J/mol
5. most probable speed of C3H8 at 329 oC
m/s
6. average kinetic energy per mole of C3H8 at 329 oC
J/mol

2007-02-14 01:09:45 · 2 answers · asked by life is great 3 in Chemistry

2007-02-14 01:08:20 · 1 answers · asked by extreme2g6 1 in Earth Sciences & Geology

2007-02-14 01:07:45 · 5 answers · asked by Anonymous in Mathematics

What is the density (g/L) of H2 gas at 390 torr and 48oC?

2007-02-14 01:07:43 · 1 answers · asked by life is great 3 in Chemistry

In the tropics, water will condense in human lungs when the temperature and relative humidity are too high. Using the following information, estimate the vapor pressure of water at body temperature (37 oC). If the atmospheric temperature is 40 oC, at what relative humidity does this life-threatening process occur?
35 oC vapor pressure of water is 42.175 torr.
40 oC vapor pressure of water is 55.324 torr.

2007-02-14 01:06:05 · 2 answers · asked by life is great 3 in Chemistry

2x + y = 7
-5x + 5y = -40

2007-02-14 01:05:57 · 8 answers · asked by Rocstarr 2 in Mathematics

any ideas

2007-02-14 01:03:47 · 8 answers · asked by "sweet gurl" 1 in Other - Science

Carbon monoxide and molecular oxygen react to form carbon dioxide. A 50.0 L reactor at 25.0 oC is charged with 1.00 atm of CO. The gas is then pressurized with O2 to give a total pressure of 3.03 atm. The reactor is sealed, heated to 350 oC to drive the reaction to completion, and cooled back to 25.0 oC. Compute the final partial pressure of each gas (in atm).

What is the final pressure of CO?
What is the final pressure of CO2?
What is the final pressure of O2?

2007-02-14 01:03:35 · 2 answers · asked by life is great 3 in Chemistry

not firt like room tempure

2007-02-14 01:02:18 · 4 answers · asked by Dayo A 1 in Chemistry

Is it possible for a compound to absorb light of a certain wavelength and emit light of a shorter wavelength? Normally compounds emit light of a longer wavelength like UV to visible. I know shorter wavelengths have more energy so perhaps it has to absorb 2 photons for every 1 it emits.

2007-02-14 01:01:52 · 3 answers · asked by AaronX 2 in Physics

2007-02-14 01:01:22 · 2 answers · asked by divot61 1 in Weather

2007-02-14 01:00:23 · 8 answers · asked by ana.@#$% 1 in Medicine

about regeneration capacity of human

2007-02-14 00:59:11 · 11 answers · asked by Moniefred f 1 in Biology

It is the thing that is liked by every one.

2007-02-14 00:58:46 · 3 answers · asked by Anonymous in Physics

about regeneration capacity of human

2007-02-14 00:58:04 · 7 answers · asked by Moniefred f 1 in Biology

2007-02-14 00:57:54 · 6 answers · asked by dallen3330 1 in Mathematics