Answer:
First Blank: 656.3 kJ
Second Blank: Endothermic
Explanation:
Edge 21'
The mechanism is as suggested
1) Protonation of alcohol
2) removal of water molecule to give carbocation
3) hydride shift to give more stable carbocation [rearrangement]
4) the stability of carbocation due to resonance
5) removal of proton and formation 1-phenyl-1-propanone.
This is Pinacole pinacolone rearrangement
Thus the reaction can be depicted as
<span>Statement A is wrong because all atoms has protons and neutrons in the neucleus except for hydrogen that has only one proton in the neuclues. Statement B is also wrong. Statement C is correct as there exists isotopes which are atoms of the same element wich exist with different number of neutrons.</span>
<u>Answer:</u> The new volume of the gas is 0.11 L
<u>Explanation:</u>
To calculate the volume when temperature and pressure has changed, we use the equation given by combined gas law.
The equation follows:
where,
are the initial pressure, volume and temperature of the gas
are the final pressure, volume and temperature of the gas
At STP:
The temperature at this condition is taken as 273 K and the pressure at this condition is taken as 1 atm or 101.3 kPa.
We are given:
Putting values in above equation, we get:
Hence, the new volume of the gas is 0.11 L
Answer:
Fe
Explanation:
The electrical conductivity depends mainly on the type of chemical bonds between the atoms of a compound.
In the case of MgF2, FeCl3 and FeO3, these have the type of ionic bond. This means that in the atoms of the compound there is an electron transfer, to keep eight electrons in the outermost layer and thus resemble the electronic configuration of the inert gas closest to each of the two elements, due to this ions of opposite charges are formed that are held together by electrostatic forces. These types of compounds are good conductors of electricity, however, to have this property, they must be dissolved in water or molten.
In the case of Fe, however, the type of union between atoms is metallic. In this type of junction, valence electrons are quite free inside the metal, which makes it easy for them to move. For this reason, this compound will conduct electricity in a solid state.