If the temperature is increased, the average speed and kinetic energy of the gas molecules increase. If the volume is held constant, the increased speed of the gas molecules results in more frequent and more forceful collisions with the walls of the container, therefore increasing the pressure
The mass sample of nicotine combusted = 2.625 mg (given)
Mass of 
produced = 7.1210 mg (given)
Mass of 
produced = 2.042 mg (given)
Molar mass of = 44 g/mol
Molar mass of = 18 g/mol
Percentage of Carbon = 
%
Percentage of hydrogen = 
%
Now, for percentage of nitrogen = 
%
Calculating the moles of each element:
- For
- For
- For
Dividing with the smallest mole value to calculate the molar ratio of each element:
Hence, the empirical formula for nicotine is 
.
POPOPOPOPOPOPOPOPOPOPOPOPOPOPO
In the modern periodic table, elements are arranged by atomic number.<span> They are placed with the lowest atomic number first, and elements with increasing atomic numbers run to the right. They are also arranged in vertical columns known as groups, with these groupings based on shared properties.</span>
Answer:
A.It is a reaction involving pi-electrons.
D.It is *not* a reaction favored by entropy considerations.
Explanation:
The Diels-Alder reaction is a [4+2]- cycloadition that involoves pi-electrons (4 from the diene and 2 from the dienophile).
The reaction is favored by the formation of new sigma bond, since they are more stable than pi-bonds. This reaction is not favored by entropy because there are 2 reactants and one product and the order increases.
The reaction happens in one step.
