Concept explainers
Interpretation:
The molecular formula of the given compound has to be calculated.
Concept Introduction:
Ideal gas is the most usually used form of the ideal gas equation, which describes the relationship among the four variables P, V, n, and T. An ideal gas is a hypothetical sample of gas whose pressure-volume-temperature behavior is predicted accurately by the ideal gas equation.
The molar mass formula

Answer to Problem 5.57QP
Hence, the molecular formula is
Explanation of Solution
The mole of the compound is calculated by plugging in the values of the given volume,
Pressure and temperature.
The moles of the compound.
The moles of the compound was found to be
The molar mass is calculated by plugging in the given weight of compound and moles of compound.
The molar mass
The molar mass was found to be
In order to find the empirical formula, the mass of
Since the compound only contains P and F, the mass of P in the 0.2324 g sample is:
The mass was found to be
We can convert masses of P and F to moles of each substance.
The moles of each substance was found to be
Dividing by the smallest number of moles (0.003371mol) gives the empirical formula as
To determine the molecular formula, divide the molar mass by the empirical mass.
Hence, the molecular formula is
The molecular formula of the given compound was determined.
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Chapter 5 Solutions
ALEKS 360; 18WKS F/ GEN. CHEMISTRY >I<
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