Answer: C
Explanation:
If you have a good counter example then you could prove it wrong.
<u>Answer:</u> The wavelength of an electron is ![2.121\times 10^{-11}m](https://tex.z-dn.net/?f=2.121%5Ctimes%2010%5E%7B-11%7Dm)
<u>Explanation:</u>
To calculate the wavelength of a particle, we use the equation given by De-Broglie's wavelength, which is:
![\lambda=\frac{h}{mv}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7Bh%7D%7Bmv%7D)
where,
= De-Broglie's wavelength = ?
h = Planck's constant = ![6.626\times 10^{-34}Js](https://tex.z-dn.net/?f=6.626%5Ctimes%2010%5E%7B-34%7DJs)
m = mass of electron = ![9.109\times 10^{-31}kg](https://tex.z-dn.net/?f=9.109%5Ctimes%2010%5E%7B-31%7Dkg)
v = velocity of electron = ![3.43\times 10^{7}m/s](https://tex.z-dn.net/?f=3.43%5Ctimes%2010%5E%7B7%7Dm%2Fs)
Putting values in above equation, we get:
![\lambda=\frac{6.626\times 10^{-34}Js}{(9.109\times 10^{-31}kg)\times (3.43\times 10^{7}m/s)}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7B6.626%5Ctimes%2010%5E%7B-34%7DJs%7D%7B%289.109%5Ctimes%2010%5E%7B-31%7Dkg%29%5Ctimes%20%283.43%5Ctimes%2010%5E%7B7%7Dm%2Fs%29%7D)
![\lambda=2.121\times 10^{-11}m](https://tex.z-dn.net/?f=%5Clambda%3D2.121%5Ctimes%2010%5E%7B-11%7Dm)
Hence, the wavelength of an electron is ![2.121\times 10^{-11}m](https://tex.z-dn.net/?f=2.121%5Ctimes%2010%5E%7B-11%7Dm)
Answer:
2.408x10^23 molecules
Explanation:
Avogadro's hypothesis gives us a background understanding that 1mole of any substance contains 6.02x10^23 molecules.
From the above conclusion,
1mole of N205 contains 6.02x10^23 molecules.
Therefore, 0.4mole of N2O5 will contain = 0.4 x 6.02x10^23 = 2.408x10^23 molecules
Answer:
is used in scientific measurements.
Explanation:
A complete metric system of units of measurements for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric....
Answer. By adding the proportionality constant .
Explanation:
suppose '<em>x' a </em>is directly proportional to the<em> 'y' , </em>where<em> x </em>and <em>y </em>are variables:
<em>x </em>∝ <em>y</em>
with an input of constant value 'K' proportionality relation gets converted into an equation:
<em>x = </em>K <em>y</em>
For example : Gravitational force is directly proportional to the product of two masses and inversely proportional to the square of the distance between the two masses.
F ∝ ![\frac {m_1m_2}{r^{2}}](https://tex.z-dn.net/?f=%5Cfrac%20%7Bm_1m_2%7D%7Br%5E%7B2%7D%7D)
To convert this proportionality relation constant 'G' was introduced known as gravitational constant whose value remains constant under every conditions.
![F=\frac {G\times m_1m_2}{r^{2}}](https://tex.z-dn.net/?f=F%3D%5Cfrac%20%7BG%5Ctimes%20m_1m_2%7D%7Br%5E%7B2%7D%7D)
![G=6.67408\times 10^{-11}m^3Kg^{-1}s^{-2}](https://tex.z-dn.net/?f=G%3D6.67408%5Ctimes%2010%5E%7B-11%7Dm%5E3Kg%5E%7B-1%7Ds%5E%7B-2%7D)