The molecular weight of the substance is 30.46 g/mol.
Molar mass can be defined as the mass is divided by the number of moles of the substance.
Step 1: calculating the moles
Given, the mass is 177 g
Pressure is 1.18 atm.
The volume is 2.30 L
By the formula of ideal gas
[tex]\rm PV = nrt\\1.18 \times 2.30 = n \times 8.312 \times 10^-^2 \times 19.0\\\\n = \dfrac{8.312 \times 10^-^2 \times 19.0}{1.18 \times 2.30} = 0.581 \;mol[/tex]
Step2 -calculate the molecular weight
The moles are 0.581
[tex]\rm Molar\;mass = \dfrac{mass}{number\;of\;moles} \\\\\rm Molar\;mass = \dfrac{17.7g}{0.581} = 30.46[/tex]
Thus, the molecular weight is 30.46 g/mol
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