
Concept explainers
(a)
Interpretation: This is to determine whether the given statement for the pressure of helium and neon gases present in two separate flasks under the given conditions is true of false.
Concept introduction:
Pressure, volume, temperature and number of moles of a gas are related through a
(a)

Answer to Problem 83UTC
The given statement is true.
Explanation of Solution
As per the ideal gas equation:
Here, P is pressure, V is volume, n is number of moles, R is Universal gas constant and T is temperature.
Here, number of moles is ratio of mass and molar mass thus, above equation can be rewritten as follows:
According to equation (2), the pressure P of a gas is inversely proportional to its molar mass. The molar mass for
Hence, the given statement is true.
(b)
Interpretation: This is to determine whether the given statement for thedenisty of helium and neon gases present in two separate flasks under the given conditions is true of false.
Concept introduction:
Density can be calculated from mass and volume as follows:
(b)

Answer to Problem 83UTC
The given statement is true.
Explanation of Solution
The density is given as:
Since, the mass and volume of both the gases are same. Therefore, ratio of mass and volume that is the density of both the gases are same.
Under the given conditions,
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Chapter 11 Solutions
EP BASIC CHEMISTRY-STANDALONE ACCESS
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