Answer: C
Explanation:
Hot air is a lot less dense for a few reasons. Hot air essentially means the particles have more kinetic energy, and move around a lot more. Cold air is dense because the particles move a lot less, have less energy, and are closer together.
Answer:
Compound.
Explanation:
That would be compound as it consists of a number of elements bonded together. It is inorganic not organic.
1.63 moles since 1 mole is equal to 136.4332 grams
Answer:
The answer to your question is V2 = 2666.7 ml
Explanation:
Data
Pressure 1 = P1 = 2 atm
Volume 1 = V1 = 4000 ml
Pressure 2 = P2 = 3 atm
Volume 2 = V2 = ?
Process
To solve this problem use Boyle's law.
P1V1 = P2V2
-Solve for V2
V2 = P1V1 / P2
-Substitution
V2 = (2)(4000)/3
-Simplification
V2 = 8000 / 3
-Result
V2 = 2666.7 ml
-Conclusion
If we increase the pressure, the volume will decrease.
The question is incomplete, here is the complete question:
At 20°C the vapor pressure of benzene is 75 torr, and that of toluene is 22 torr. Assume that benzene and toluene form an ideal solution.
What is the mole fraction of benzene in the solution that has a vapor pressure of 38 torr at 20°C? Express your answer using two significant figures.
<u>Answer:</u> The mole fraction of benzene is 0.302
<u>Explanation:</u>
Let the mole fraction of benzene be 'x' and that of toluene is '1-x'
To calculate the total pressure of the mixture of the gases, we use the equation given by Raoult's law, which is:
We are given:
Vapor pressure of benzene = 75 torr
Vapor pressure of toluene = 22 torr
Vapor pressure of solution = 38 torr
Putting values in above equation, we get:
Hence, the mole fraction of benzene is 0.30