Answer:
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to calculate the vapor pressure of pure toluene by using the Raoult's law as shown below:
Thus, we solve for the mole fraction of benzene in the vapor phase first:
Which means that the mole fraction of toluene in the vapor phase is 0.24, and therefore, the vapor pressure of pure toluene turns out to be:
Regards!
Answer:
Ok, is this a true and false question? Anyways, yes. the central dogma, from dna transcription to mRNA translation to proteins. and further regulation can occur through post-translational modifications of proteins. it is a true statement
Explanation:
Two blocks of platinum have a temperature of 200 Celsius. Both the blocks have the same amount of thermal energy because both are metals which conducts heat energy throughout their bodies.
<h3>What is conduction?</h3>
Conduction is the process by which heat energy is transmitted between neighboring atoms or molecules. We know that metals are the good conductors of heat and electricity so if one part absorb heat, it will spread to the whole body so we can conclude that the thermal energy will remain the same amount throughout the whole body.
Learn more about thermal energy here: brainly.com/question/19666326
Answer:
The ice cube would sink, as the density of ice is greater than that of water. Hope this helps! =) pls give me brainilest! =)
The dissociation constant of the base : 7.4 x 10⁻⁴
<h3>Further explanation</h3>
Butylamine, C4H9NH2 Is A Weak Base
Kb is the dissociation constant of the base.
LOH (aq) ---> L⁺ (aq) + OH⁻ (aq)
![\rm Kb=\dfrac{[L][OH^-]}{[LOH]}](https://tex.z-dn.net/?f=%5Crm%20Kb%3D%5Cdfrac%7B%5BL%5D%5BOH%5E-%5D%7D%7B%5BLOH%5D%7D)
[OH⁻] for weak base can be formulated :
![\tt [OH^-]=\sqrt{Kb.M}](https://tex.z-dn.net/?f=%5Ctt%20%5BOH%5E-%5D%3D%5Csqrt%7BKb.M%7D)
pH of solution : 12
pH+pOH=14, so pOH :
14-12 = 2, then :
![\tt [OH^-]=10^{-pOH}\\\\(OH^-]=10^{-2}](https://tex.z-dn.net/?f=%5Ctt%20%5BOH%5E-%5D%3D10%5E%7B-pOH%7D%5C%5C%5C%5C%28OH%5E-%5D%3D10%5E%7B-2%7D)
the the dissociation constant (Kb) =
Or you can use from ICE method :
C4H9NH2(aq) + H2O(l) ⇌ C4H9NH3+(aq) + OH-(aq)
0.15
x x x
0.15-x x x
![\tt Kb=\dfrac{x^2}{0.15-x}\rightarrow x=[OH^-]\\\\Kb=\dfrac{10^{-4}}{0.15-10^{-2}}=7.14\times 10^{-4}](https://tex.z-dn.net/?f=%5Ctt%20Kb%3D%5Cdfrac%7Bx%5E2%7D%7B0.15-x%7D%5Crightarrow%20x%3D%5BOH%5E-%5D%5C%5C%5C%5CKb%3D%5Cdfrac%7B10%5E%7B-4%7D%7D%7B0.15-10%5E%7B-2%7D%7D%3D7.14%5Ctimes%2010%5E%7B-4%7D)
