Answer:
x positive and y negative I think
Explanation:
<span>The minimum energy required for isomerization is 267 000 J/mol
</span>
The isomerization of cis-but-2-ene to trans-but-2-ene requires breaking of the π bond.
The bond energy of a C-C σ bond is 347 kJ/mol.
The bond energy of a C=C double bond (σ + π) is 614 kJ/mol.
So the bond energy of a π bond is (614 – 347) kJ/mol = 267 kJ/mol =
267 000 J/mol.
The closer to the equator, the hotter the climate will be.
Explanation:
Density is mass divided by volume:
D = M / V
Given V = 79000 cm³ and D = 13.6 g/cm³:
13.6 g/cm³ = M / (79000 cm³)
M = 1,074,400 g
M = 1,074 kg
Round as needed.
Ans: The electron is moving at
0.732% relative to speed of light.
Explanation:According to the <span>de Broglie relationship:
</span>
![\lambda = \frac{h}{mv}](https://tex.z-dn.net/?f=%5Clambda%20%3D%20%20%5Cfrac%7Bh%7D%7Bmv%7D%20)
<span>
So,
</span>
![v= \frac{h}{m\lambda}](https://tex.z-dn.net/?f=v%3D%20%5Cfrac%7Bh%7D%7Bm%5Clambda%7D%20)
<span>h = Planck's constant = 6.626 * 10^-34 Js
</span><span>m = mass of electron = 9.11 * 10^-31 kg
</span>λ = wavelength = 3.31 * 10^-10 m
![v= \frac{6.626 * 10^{-34}}{9.11 * 10^{-31}*3.31 * 10^{-10}}](https://tex.z-dn.net/?f=v%3D%20%5Cfrac%7B6.626%20%2A%2010%5E%7B-34%7D%7D%7B9.11%20%2A%2010%5E%7B-31%7D%2A3.31%20%2A%2010%5E%7B-10%7D%7D%20)
<span>
</span>
![v = 2.197 * 10^6](https://tex.z-dn.net/?f=v%20%3D%202.197%20%2A%2010%5E6%20)
m/s
<span>
Since the electron is moving relative to the speed of light, therefore the ratio is(in %):
</span>
![\frac{v}{c} *100](https://tex.z-dn.net/?f=%20%5Cfrac%7Bv%7D%7Bc%7D%20%2A100)
% =
![\frac{ 2.197 * 10^6}{3*10^8}*100](https://tex.z-dn.net/?f=%20%5Cfrac%7B%202.197%20%2A%2010%5E6%7D%7B3%2A10%5E8%7D%2A100)
% =
0.732%<span>
</span>