Answer:
Calcium chlorate | Ca(ClO3)2 - PubChem.
Explanation:
This problem is describing the vapor-liquid equilibrium between benzene and toluene in which equal moles of each component are present in the vapor and the initial compositions in the liquid are required, considering that the vapor pressures of benzene and toluene are 750. torr and 300. torr respectively.
In this case, it turns out possible to use the Raoult's law in order to come up with a model for this system:
Thus, we infer that the compositions of benzene and toluene in the vapor are both 0.5 because equal number of moles are condensed. Next, since the mole fractions in the liquid phase sum 1, we rewrite the previous expressions as follows:
And insert one into the other, via the total pressure:
Now, we can start plugging in the numbers we were given:
Then, solve for the mole fraction of benzene in the liquid phase:
And finally, the mole fraction of toluene in the liquid phase:
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Answer:
87.5 mi/hr
Explanation:
Because a = Δv / Δt (a = vf - vi/ Δt), we need to find the acceleration first to know the change in velocity so we can determine the final velocity.
vf = 60 mi/hr
vi = 0 mi/hr
Δt = 8 secs
a = vf - vi/ Δt
= 60 mi/hr - 0 mi/hr/ 8 secs
= 60 mi/hr / 8 secs
= 7.5 mi/hr^2
Now that we know the acceleration of the car is 7. 5 mi/hr^2, we can substitute it in the acceleration formula to find the final velocity when the initial velocity is 50 mi/hr after 5 secs.
vi = 50 mi/ hr
Δt = 5 secs
a = 7.5 mi/ hr^2
a = vf - vi/ Δt
7.5 = vf - 50 mi/hr / 5 secs
37.5 = vf - 50
87.5 mi/ hr = vf
Answer: The answer is blue, white, yellow-white, orange.
Explanation: These are the two basic reasons for different star colors:
Temperature – cooler stars are red, warmer ones are orange through yellow and white. The hottest stars shine with blue light
Age – As a star ages it produces different chemicals which burn at different temperatures. We can use a star’s color to show its relative age
Answer:
a) distance is 4+7+1+8=20 blocks
b) displacement is 10 blocks
Explanation:
find displacement: x and y
x axis displacement = 4-1 = 3 blocks
y axis displacement = -7+8= 1 block
displacement = the square root of 3^2 + 1^2
= 9+1 = 10 blocks.
You can find the angle of displacement with respect to the initial position using trig identities, if you wish.