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
Liquid antacids contain suspensions of bases like aluminum hydroxide and magnesium hydroxide. These are usually the bases that can neutralize the stomach acids.
The chemical equation representing the neutralization reaction of stomach acid, HCl and antacid, aluminum hydroxide: Three moles of hydrochloric acid reacts with one mole aluminum hydroxide to give the salt, aluminum chloride and three moles of water.
![3 HCl (aq) + Al(OH)_{3}(aq)-->AlCl_{3}(aq) + 3 H_{2}O(l)](https://tex.z-dn.net/?f=%203%20HCl%20%28aq%29%20%2B%20Al%28OH%29_%7B3%7D%28aq%29--%3EAlCl_%7B3%7D%28aq%29%20%2B%203%20H_%7B2%7DO%28l%29%20%20%20%20)
Answer:
25 mol
Explanation:
2C₈H₁₈ + 25O₂ ⟶ 16CO₂ + 18H₂O
The equation tells us that 25 mol O₂ generate 18 mol H₂O.
Answer:
A: heat energy
Explanation:
because as we light up the bulb it gives us light energy
but when we touch it we feel that it is hot (heat energy)
the heat energy given of is not for our use and goes to waste
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