Answer:
Therefore (2.30-0.03747)= 2.2625 M of HI remains from an initial concentration of 2.30 M after 4.5 hours.
Step-by-step explanation:
second order reaction: The rate of reaction proportional to the square of the concentration of reactant.
For second order reaction
![k=\frac{x}{ta(a-x)}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7Bx%7D%7Bta%28a-x%29%7D)
K is rate constant = 1.6×10⁻³M⁻¹hr⁻¹
a = initial concentration of reactant = 2.30 M
a-x = concentration of reactant after t h
t = time = 4.5 h
Putting the values in the above equation,
![1.6\times 10^{-3}= \frac{x}{4.5 \times 2.30 \times (2.30-x)}](https://tex.z-dn.net/?f=1.6%5Ctimes%2010%5E%7B-3%7D%3D%20%5Cfrac%7Bx%7D%7B4.5%20%5Ctimes%202.30%20%5Ctimes%20%282.30-x%29%7D)
![\Rightarrow 16.56 \times 10^{-3}\times (2.30-x)= x](https://tex.z-dn.net/?f=%5CRightarrow%2016.56%20%5Ctimes%2010%5E%7B-3%7D%5Ctimes%20%282.30-x%29%3D%20x)
![\Rightarrow 16.56 \times 10^{-3}\times 2.30-16.56 \times 10^{-3}\times x= x](https://tex.z-dn.net/?f=%5CRightarrow%2016.56%20%5Ctimes%2010%5E%7B-3%7D%5Ctimes%202.30-16.56%20%5Ctimes%2010%5E%7B-3%7D%5Ctimes%20x%3D%20x)
![\Rightarrow (1+16.56 \times 10^{-3}) x=16.56 \times 10^{-3}\times 2.30](https://tex.z-dn.net/?f=%5CRightarrow%20%281%2B16.56%20%5Ctimes%2010%5E%7B-3%7D%29%20x%3D16.56%20%5Ctimes%2010%5E%7B-3%7D%5Ctimes%202.30)
![\Rightarrow x = 0.03747](https://tex.z-dn.net/?f=%5CRightarrow%20x%20%3D%200.03747)
Therefore (2.30-0.03747)= 2.2625 M of HI remains from an initial concentration of 2.30 M after 4.5 hours.
<span>The measure of angle dcb is 120</span>°.<span>
Because in a parallelogram, Consecutive angles are supplementary that means (D + C = 180°).
given that angle adc is equal to 60</span>°
So, ∠adc + ∠dcb = 180°
60 ° + ∠dcb = 180°
∠dcb = 180 - 60 = 120°
Thus, the measure of angle dcb is 120°.
0.62, 59%, and 3/4
these are all more than 50% which is what 1/2 is.
Answer:
![t = 6\,h](https://tex.z-dn.net/?f=t%20%3D%206%5C%2Ch)
Step-by-step explanation:
Given that both men moves at constant speed on the same trail, the motion equations that describes each motion are, respectively:
Man 1
![x = 60 \cdot t](https://tex.z-dn.net/?f=x%20%3D%2060%20%5Ccdot%20t)
Man 2
![x = 90 \cdot (t-2)](https://tex.z-dn.net/?f=x%20%3D%2090%20%5Ccdot%20%28t-2%29)
Where x is measure in kilometers and t in hours, respectively.
The time taken for both men to meet each other is:
![60\cdot t = 90\cdot (t-2)](https://tex.z-dn.net/?f=60%5Ccdot%20t%20%3D%2090%5Ccdot%20%28t-2%29)
![30\cdot t = 180](https://tex.z-dn.net/?f=30%5Ccdot%20t%20%3D%20180)
![t = 6\,h](https://tex.z-dn.net/?f=t%20%3D%206%5C%2Ch)
Answer:
x = 44
y = 136
z = 136
Step-by-step explanation:
The angles of a triangle have to add up to 180°
54 + 82 + x = 180
136 + x = 180
x = 44
We know that y and z are vertical angles, so they have the same measurements.
Also, x and the other angle across from it are also vertical angles.
88 + 2n = 360
2n = 272
n = 136
Therefore,
x = 44
y = 136
z = 136