Respuesta :
The molar mass of gas x is 2.0g/mol.
Solution:
Molecular hydrogen effuses four times as fast as gas x at the same temperature
Oxygen is diatomic (O2)
Oxygen's molar mass = 32.0 g/mol.
Certain Gas = fast/light and Oxygen = slow/heavy
Set rate expression equal to the molar mass expression
[tex]\frac{4}{1}[/tex] = [tex]\sqrt{\frac{32}{x} }[/tex]
X = 2.0g/mol
Moles do not change with temperature because temperature affects volume, not mass. When a liquid or gas is heated, the molecules move faster, collide and spread. Since the molecules are distributed, they occupy more space. they are less dense. The opposite happens when a liquid or gas cools.
As the kinetic energy of the molecules in the gas increases, an increase in temperature causes the gas to expand, thus increasing in volume. When the same number of gas molecules occupy more volume, the density of air decreases. Volume is simply defined as the amount of space occupied by a three-dimensional solid.
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