Answer:
The vapor pressure of the solution is 23.3 torr
Explanation:
Step 1: Data given
Mass of urea = 5.25 grams
Mass of water = 0.100 kg = 100 grams
Temperature = 25.0 °C
Vapor pressure of water = 23.7 torr
Step 2: Calculate moles of water
Moles H2O = mass H2O / molar mass H2O
Moles H2O = 100 grams / 18.02 g/mol
Moles H2O = 5.55 moles
Step 3: Calculate moles of urea
Moles urea = 5.25 grams / 60.06 g/mol
Moles urea = 0.0874 moles
Step 4: Calculate mol fraction H2O
Mol fraction H2O = 5.55 moles / (5.55 + 0.0874)moles
Mol fraction H2O = 0.984
Step 5: calculate the vapor pressure of the solution
This means that you can use the mole fraction of water and the vapor pressure of pure water at 25°
C to determine the vapor pressure of the solution.
Psol =Xwater * Pwater
⇒Psol = the vapor pressure of the solution
⇒Xwater =the mol fraction of water
⇒Pwater = the vapor pressure of pure water
Psol = 0.984 * 23.7 torr
Psol = 23.3 torr
The vapor pressure of the solution is 23.3 torr
Metals are the majority of the periodic table. Also, they are on the left side of the periodic table. The no metals are on the right side of periodic table.
Hope I Helped!
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Answer:
The carbocation intermediate reacts with a nucleophile to form the addition product.
Explanation:
The reaction of benzene with an electrophile is an electrophillic substitution reaction. Here the electrophile replaces hydrogen. There is no formation of carbocation as intermediate in the reaction. Infact there is transition state where the electorphile attacks on benzene ring and at the same time the hydrogen gets removed from the benzene. So a transition carbocation is formed.
The general mechanism is shown in the figure.
i) Attack of the electrophile on the benzene (which is the nucleophile)
ii) The carbocation intermediate loses a proton from the carbon bonded to the electrophile.
iii) the carbocation formation is the rate determining step.
iv) There is no formation of addition product.
Thus the wrong statement is
The carbocation intermediate reacts with a nucleophile to form the addition product.
Answer:
D
Explanation:
Its the only answer that actually makes sense and i got it right on the quiz.
