City individuals -different cells. Group of individuals - Organ systems. City Road System- Circulatory system.
<u>Explanation:</u>
Any city has population. The individuals of the population can be considered as the cells that are present in a human body. As a city cannot be formed with individuals, the human body cannot survive without cells. These individuals will belong to different profession and they go to an organisation for doing various work.
These can be compared with the organ system of human body. These organ systems will be performing different functions. The network of any rod in a city can be compared with the circulatory system of human body. As it helps individuals to reach their home of any destination, the presence of arteries and veins can be compared with the highways and capillaries can be associated with side ways of the road system.
Answer:
Explanation:
In this case, we have a <u>Friedel-Craft reaction</u> (see figure 1). Usually in this type of reaction, the benzene ring is <u>bonded directly to the carbon that has the halide atom</u>. But in this specific case, this is not happening.
To understand why we have to remember the reaction mechanism of this reaction. As first, step the Cl-C bond attacks the 
and we form a new bond between the alkyl halide and the , finally the C-Cl bond is broken and a <u>carbocation is formed</u>. In this case, we will have a primary carbocation, a very <u>unstable species</u>. Therefore we will have a <u>methyl shift</u> to obtain a tertiary carbocation.
This tertiary carbocation will react with and continues the reaction. (See figure 2)
I hope it helps!
<h3>
Answer:</h3>
8.64 g
<h3>
Explanation:</h3>
- Density is the ratio of mass of substance to its volume.
- It is calculated by dividing the mass of a substance by its volume.
- Density = Mass ÷ Volume
In this case we are given,
Volume of sodium chloride = 4.00 cm³
Density of sodium chloride = 2.16 g/cm³
We are required to calculate the mass of sodium chloride,
Rearranging the formula;
Mass = Density × volume
Mass of sodium chloride = 2.16 g/cm³ × 4.00 cm³
= 8.64 g
Therefore, the mass of sodium chloride is 8.64 g
n the Bohr Model, the electron is treated as a particle in fixed orbits around the nucleus. In the Quantum Mechanical Model, the electron is treated mathematically as a wave. The electron has properties of both particles and waves.
The Bohr model was a one-dimensional model that used one quantum number to describe the distribution of electrons in the atom. The only information that was important was the size of the orbit, which was described by “n” the principle quantum number.
Schrodinger's model (Quantum Mechanical Model) allowed the electron to occupy three-dimensional space. It, therefore, required three coordinates, or three quantum numbers, to describe the distribution of electrons in the atom.
(4) a compound is the correct answer~
