Solids have least energetic molecules because they are tightly packed.
Answer:
D. Vibrating around fixed positions
Explanation:
It's right on edge
Answer:
The mole fraction of benzene and toluene in solution containing mole fraction of benzene and toluene in solution containing is 45.9%
Explanation:
don't worry
its is correct!
According to Raoult's low:
We will use this formula: Vp(Solution) = mole fraction of solvent * Vp(solvent)
∴ mole fraction of solvent = Vp(Solu) / Vp (Solv)
when we have Vp(solu) = 25.7 torr & Vp(solv) = 31.8 torr
So by substitution:
∴ mole fraction of solvent = 25.7 / 31.8 =0.808
when we assume the moles of solute NaCl = X
and according to the mole fraction of solvent formula:
mole fraction of solvent = moles of solvent / (moles of solvent + moles of solute)
by substitute:
∴ 0.808 = 0.115 / (0.115 + X)
So X (the no.of moles of NaCl) = 0.027 m
