Answer :
The molar mass of camphor is 152 g/mol.
Explanation
We have given that,
P = 12 torr or 0.01579 atm
1 atm = 760 torr
Density = 0.0829 g/l
R = 0.0821 L.atm/mol.K
And temperature is
T = 273° K + 80° K
= 353° K
As we all know,
PV = nRT
so, PV = mass × R × T / molar mass
also, P = mass × R × T / volume × molar mass
here, mass/ volume = density (d)
P = dRT / molar mass
Now putting the values and simplify,
0.01579 = 0.0829 × 0.0821 × 353 / molar mass
molar mass = 152.156 g/mol.
thus, the molar mass of camphor is 152 g/mol.
What is molar mass?
The molar mass of a chemical substance is determined in chemistry by dividing the amount of a substance with that compound by the quantity of that compound, which is the number of moles in exactly that sample, which is measured or calculated in moles.
In contrast to molecular properties, a substance's molar mass is a bulk property. The compound is present in many different forms, each with a different mass as a result of the isotopes. The molar mass is the average of these masses.
The molar mass is often calculated using the standard atomic weights and is therefore an average for Earth and a function of the relative abundance of the constituent atoms' isotopes.
Learn more about molar mass
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