The vapor pressure of pure benzene at a certain temperature is 0.750 bar. When a non- volatile, non-electrolyte solid weighing 0.5 g is added to 39 g of benzene (molar mass 78 g moll) the vapor pressure of the solution becomes 0.745 bar. What is the molar mass of the substance? A 150 g mor B. 170 g mol? C. 220 g mor? D. 120 g mor?
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Answer:
Let a and \mathrm{b}
b
are two numbers such that \mathrm{a}^{2}+\mathrm{b}^{2}=4, \mathrm{a}^{3}+\mathrm{b}^{3}=7
a 2
+b 2
=4,a 3
+b 3
=7
. If product of \mathrm{a}
a
and \mathrm{b}
b
is positive integer then a + b CANNOT be
Step-by-step explanation:
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