Answer:
The speed of an electron is 0.01908 m/s.
Explanation:
De-Broglie wavelength is given by:
![\lambda=\frac{h}{mv}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7Bh%7D%7Bmv%7D)
where,
= wavelength of a particle
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 particle
v = velocity of the particle
Velocity of an electron = v
Mass of an electron = ![9.1\times 10^{-31}kg](https://tex.z-dn.net/?f=9.1%5Ctimes%2010%5E%7B-31%7Dkg)
Wavelength of electron is twice the displacement in seconds which is velocity of an electron.
Then.wavelength of an electron = ![\lambda =2v](https://tex.z-dn.net/?f=%5Clambda%20%3D2v)
![\lambda =2v=\frac{6.626\times 10^{-34}Js}{9.1\times 10^{-31}kg\times v}](https://tex.z-dn.net/?f=%5Clambda%20%3D2v%3D%5Cfrac%7B6.626%5Ctimes%2010%5E%7B-34%7DJs%7D%7B9.1%5Ctimes%2010%5E%7B-31%7Dkg%5Ctimes%20v%7D)
v = 0.01908 m/s
The speed of an electron is 0.01908 m/s.
I believe it is NaCl(aq) + H2O
Answer:
Collid
Explanation:
Toothpaste is a colloid, because it's part solid and part liquid. ... A colloid is a heterogeneous mixture of two substances of different phases. Shaving cream and other foams are gas dispersed in liquid. Jello, toothpaste, and other gels are liquid dispersed in solid.
D will because water just turns from liquid to a gas by adding heat. That is a physical change. The other equations are chemical changes.