Two flasks have the same volume. One is filled with a gas X, and the other with oxygen gas, both at the same pressure, but with different temperatures of 200K and 800K respectively.
a) State and explain which of the two gas samples contain the greatest number of molecules.
b) Determine the molar mass of X, if the mass of one molecule of gas X is 1.06×10^—22
(Avogadro's
constant= 6.02×10^23)
c) State with reasons, which of X and oxygen will diffuse faster under the same conditions.
Answers
Answer:
The general relationship between pressure (P) and the height of a liquid column in a
barometer is P = gdh, where g is the constant acceleration of gravity and d is the density.
Examination of this relationship indicates that for a given pressure, as the density of the
liquid in the barometer decreases, the height of the liquid must increase. In order to make this
relationship more apparent, you can rearrange the equation to:
gh =
P
d
Keeping in mind that you are conducting the experiment at a constant pressure and that
gravity is a constant, this mathematical relationship demonstrates that the height of the liquid
in the barometer is inversely proportional to the density of the liquid in the barometer.
(h ∝ 1
d )
This inverse relationship means that as the height of the liquid decreases, the density of the
liquid must increase. Since the density of mercury is greater than the density of water, the
barometer with the water will have the higher column.
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Explanation: