Answer:
T = 4.062V
Explanation:
from PV = nRT => T = PV/RT
P = 1 atm
V = Final Volume
n = 3 moles
R = 0.08206 L·atm/mol·K
T = ?
T = 1 atm · V(Liters)/(3 moles)(0.08206L·atm/mol·K) = 4.062·V(final) Kelvin
It means that is it a sugar molecule
The statement that correctly explains the polarity of the water molecule is B. Oxygen end has a partial negative charge and the hydrogen end has a partial positive charge.
Answer:
Kinetic energy: ![6.024*10^{-20}](https://tex.z-dn.net/?f=6.024%2A10%5E%7B-20%7D)
Velocity: ![3.64*10^{5}](https://tex.z-dn.net/?f=3.64%2A10%5E%7B5%7D)
Explanation:
From the equations of the photo-electric effect,
We know:
![hv=hv_0+K.E](https://tex.z-dn.net/?f=hv%3Dhv_0%2BK.E)
Where,
1.
is the Planck's constant which is ![6.626*10^{-34}](https://tex.z-dn.net/?f=6.626%2A10%5E%7B-34%7D)
2.
are the frequency of light emitted and threshold frequencies respectively.
3.
is the kinetic energy of the electrons emitted.
By fact, we come to know that the threshold frequency of Zn is 300nm
And also
Where ,
1.
is the speed of light ![=3*10^8](https://tex.z-dn.net/?f=%3D3%2A10%5E8)
2.
is the wavelength.
Thus,
![\frac{hc}{d}=\frac{hc}{d_0}+K.E\\K.E=\frac{hc}{d}-\frac{hc}{d_0}\\K.E=hc*(\frac{1}{d}-\frac{1}{d_0})\\K.E=6.626*10^{-34}*3*10^8*(\frac{1}{275*10^{-9}}-\frac{1}{300*10^{-9}})\\K.E=6.024*10^{-20}kgm^2s^{-2}](https://tex.z-dn.net/?f=%5Cfrac%7Bhc%7D%7Bd%7D%3D%5Cfrac%7Bhc%7D%7Bd_0%7D%2BK.E%5C%5CK.E%3D%5Cfrac%7Bhc%7D%7Bd%7D-%5Cfrac%7Bhc%7D%7Bd_0%7D%5C%5CK.E%3Dhc%2A%28%5Cfrac%7B1%7D%7Bd%7D-%5Cfrac%7B1%7D%7Bd_0%7D%29%5C%5CK.E%3D6.626%2A10%5E%7B-34%7D%2A3%2A10%5E8%2A%28%5Cfrac%7B1%7D%7B275%2A10%5E%7B-9%7D%7D-%5Cfrac%7B1%7D%7B300%2A10%5E%7B-9%7D%7D%29%5C%5CK.E%3D6.024%2A10%5E%7B-20%7Dkgm%5E2s%5E%7B-2%7D)
Now to find velocity:
![K.E=\frac{1}{2}mv^2\\v^2=1.324*10^{11}\\v=3.64*10^5](https://tex.z-dn.net/?f=K.E%3D%5Cfrac%7B1%7D%7B2%7Dmv%5E2%5C%5Cv%5E2%3D1.324%2A10%5E%7B11%7D%5C%5Cv%3D3.64%2A10%5E5)
Answer: 40x
4x times 10x equals 40x