Answer:
y₁ = 0.48
y₂ = 0.52
Explanation:
The method to solve this question is to use Raoult´s law for ideal solutions, which tell us that the vapor pressure of a component A in solution is equal to:
Pa = Xa Pºa
where Pa is the partial pressure of a, xa is its mole fraction, and Pºa is the vapor pressure of pure A.
From here it follows that for a binary solution the total pressure is the sum of the partial pressures of each component.
With vthis in mind we are ready to calculate and solve our question:
P1 = x₁Pº₁ = 0.670 x 20.9Torr = 14.00 torr
P₂ = x₂Pº₂ = (1-0.670) x 45.2 torr = 0.33 x 45.2 torr = 14.91 torr
Ptotal = 14.00 torr + 14.91 torr = 28.91 torr
The composition of the vapor will be given by:
y₁ = Py₁ / Ptotal = 14.00 torr/ 28.91 torr = 0.48
y₂ = 1 - y₁ = 1 - 0.48 = 0.52
Answer:
54.616
Explanation:
8.647 + 45.969
or rewrite for easier look:
45.969 +
8.647 =
54.616
Hope this helped :3
Answer:
392
Explanation:
According to the law of conservation of energy, energy cannot vanish,so the lost potential energy must be converted into another form of energy (in this case, Kinetic Energy).
(mass*g*height)-(mass*g*halfway height)=(2*9.8*40)-(2*9.8*20)
784-392=392
This makes sense because since the rock has fallen halfway, half of its potential energy has become kinetic energy. Once the rock reaches a height of 0 Meter, all of its potential energy will be kinetic energy.
To
determine the empirical formula of the compound given, we need to determine the ratio of each element in the compound. To do that we assume to have 100 grams sample
of the compound with the given composition. Then, we calculate for the number
of moles of each element. We do as follows:<span>
mass moles
C 56.79 4.73
H 6.56 6.50
O 28.37 1.77
N 8.28 0.59
Dividing the number of moles of each element with
the smallest value, we will have the empirical formula:
</span> moles ratio
C 4.73 / 0.59 8
H 6.50 / 0.59 11
O 1.77 / 0.59 3
N 0.59 / 0.59 1<span>
</span><span>
The empirical formula would be C8H11O3N.</span>
