Answer: The vapor pressure of the solution is 55.2 torr
Explanation:
and ![p_2=x_2P_2^0](https://tex.z-dn.net/?f=p_2%3Dx_2P_2%5E0)
where, x = mole fraction in solution
= pressure in the pure state
According to Dalton's law, the total pressure is the sum of individual pressures.
![p_{total}=p_1+p_2](https://tex.z-dn.net/?f=p_%7Btotal%7D%3Dp_1%2Bp_2)
![p_{total}=x_Ap_A^0+x_BP_B^0](https://tex.z-dn.net/?f=p_%7Btotal%7D%3Dx_Ap_A%5E0%2Bx_BP_B%5E0)
x = mole fraction = ![\frac{\text {moles}}{\text {total moles}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%20%7Bmoles%7D%7D%7B%5Ctext%20%7Btotal%20moles%7D%7D)
Given : 299 g of toluene and 391 g of benzene.
moles of toluene = ![\frac{\text{Given mass}}{\text {Molar mass}}=\frac{299g}{92g/mol}=3.25moles](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BGiven%20mass%7D%7D%7B%5Ctext%20%7BMolar%20mass%7D%7D%3D%5Cfrac%7B299g%7D%7B92g%2Fmol%7D%3D3.25moles)
moles of benzene= ![\frac{\text{Given mass}}{\text {Molar mass}}=\frac{391g}{78g/mol}=5.01moles](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7BGiven%20mass%7D%7D%7B%5Ctext%20%7BMolar%20mass%7D%7D%3D%5Cfrac%7B391g%7D%7B78g%2Fmol%7D%3D5.01moles)
Total moles = moles of solute (toluene) + moles of solvent (benzene) = 3.25 + 5.01 = 8.26
= mole fraction of benzene =![\frac{3.25}{8.26}=0.39](https://tex.z-dn.net/?f=%5Cfrac%7B3.25%7D%7B8.26%7D%3D0.39)
=mole fraction of toluene = (1-0.39) = 0.61
![p_{benzene}^0=96.4torr](https://tex.z-dn.net/?f=p_%7Bbenzene%7D%5E0%3D96.4torr)
![p_{toluene}^0=28.9torr](https://tex.z-dn.net/?f=p_%7Btoluene%7D%5E0%3D28.9torr)
![p_{total}=0.39\times 96.4+0.61\times 28.9=55.2torr](https://tex.z-dn.net/?f=p_%7Btotal%7D%3D0.39%5Ctimes%2096.4%2B0.61%5Ctimes%2028.9%3D55.2torr)
Thus the vapor pressure of the solution is 55.5 torr
Answer:
From the equation you will see that 1 mol of propane generates 4 mols of water.
Since the molar mass of water
M
(
H2O)=2×1+16=18g/mol
2 mol propane will generate
2
×4×18=144g of water
Explanation:
Since the molar mass of water
M
(
H2O)=2×1+16=18g/mol
2 mol propane will generate
2
×4×18=144g of water
Answer:
hydrant flying with balloon, balloon has lithp letting air out, bee: really yum balloon
= = = =
hydrogen helium lithium beryllium
be bore on the balloon, balloon pops, hydrant drops and makes a car bomb
= =
boron carbon
night row general gets hurt by car bomb nearby, that general gets off boat
=
nitrogen
wearing oxygen mask, mask is full of fluride gel, then he got neon teeth
= = =
oxygen fluorine neon
(try making a story out of the elements, use your imagenation)
double-displacement reaction
Explanation:
We have the chemical reaction:
Na₂S (aq) + Cd(NO₃)₂ (aq) → CdS (s) + 2 NaNO₃ (aq)
where:
(aq) - aqueous
(s) - solid
This is a double-displacement reaction because the reactants exchange atoms or group of atoms between themselves to form the products. To drive the reaction to the right, one of the products is a precipitate.
Generally we can express the double-displacement reaction as following:
AB + CD → AC + BD
Learn more about:
types of chemical reactions
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