The term nuclear charge refers to the precise charge of the nucleus, which, in units of fundamental charge, is equal to the numb
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Answer: The standard enthalpy of formation of liquid octane is -250.2 kJ/mol
Explanation:
The given balanced chemical reaction is,
First we have to calculate the enthalpy of reaction .
where,
We are given:
Putting values in above equation, we get:
Thus the standard enthalpy of formation of liquid octane is -250.2 kJ/mol
Answer:
Explanation:
In this reaction, we must exchange the amino group () for a fluorine atom (
). Also, the first step in this reaction is the addition of nitrous acid.
We must remember that the amino group in the presence of nitrous acid produces a diazonium salt. The group is a very good leaving group and many benzene derivatives can be produced from this intermediate (see figure 1).
If what we want is to bond a fluorine atom we must use to be able to produce m-ethylfluorobenzene (see figure 2).
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Answer:
The volume when the pressure is changed to 1.23 atm and temperature is constant will be <u><em>6.3075 L</em></u>.
Explanation:
Pressure and volume are related by Boyle's law that says:
"The volume occupied by a certain gas mass at a constant temperature is inversely proportional to the pressure"
Boyle's law is expressed mathematically as:
P * V = k
where:
- P: Pressure
- V: Volume
- k: Constant
Assuming a certain volume of gas V1 is at a pressure P1 at the beginning of the experiment. By varying the volume of gas to a new V2 value, then the pressure will change to P2, and the following will be true:
P1 * V1 = P2 * V2
In this case you have:
- P1= 754 torr= 0.9921 atm (1 atm=760 torr)
- V1= 7.82 L
- P2=1.23 atm
- V2=?
Replacing:
0.9921 atm*7.82 L=1.23 atm*V2
Resolving:
V2≅6.3075 L
<u><em>The volume when the pressure is changed to 1.23 atm and temperature is constant will be 6.3075 L.</em></u>