<u>Answer:</u> The number of formula units in the given amount of NaCl are ![1.1\times 10^{18}](https://tex.z-dn.net/?f=1.1%5Ctimes%2010%5E%7B18%7D)
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
![\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20moles%7D%3D%5Cfrac%7B%5Ctext%7BGiven%20mass%7D%7D%7B%5Ctext%7BMolar%20mass%7D%7D)
Given mass of NaCl = 0.11 mg =
(Conversion factor: 1 g = 1000 mg)
Molar mass of NaCl = 58.5 g/mol
Putting values in above equation, we get:
![\text{Moles of NaCl}=\frac{1.1\times 10^{-4}g}{58.5g/mol}=1.88\times 10^{-6}mol](https://tex.z-dn.net/?f=%5Ctext%7BMoles%20of%20NaCl%7D%3D%5Cfrac%7B1.1%5Ctimes%2010%5E%7B-4%7Dg%7D%7B58.5g%2Fmol%7D%3D1.88%5Ctimes%2010%5E%7B-6%7Dmol)
According to mole concept:
1 mole of a compound contains
number of formula units
So,
moles of NaCl will contain =
number of formula units
Hence, the number of formula units in the given amount of NaCl are ![1.1\times 10^{18}](https://tex.z-dn.net/?f=1.1%5Ctimes%2010%5E%7B18%7D)
Answer:
Rutherford predicted that an atom has a dense core called a <u>nucleus</u>.
Explanation:
Ernest Rutherford was a physicist who is known as the father of nuclear physics. He suggested an atomic model known as the Rutherford model. According to him, the atom consists of a tiny, dense, positively charged core called a nucleus and negatively charged particles called electrons that circulate around it The nucleus consists of positively charged particles called protons and neutral particles called neutrons.
B, the physical components
Aniline has smallest Rf value on silica gel since it is more polarthan the other compounds because aniline is a hydrogen donor and acceptor itmakes the molecule more attracted to the silica gel which is also also polar as<span>‘likes dissolve likes.’</span>
Answer:
2Na + 2H2O---->2NaOH + H2