Answer:
Some of the properties of cobalt silicate include:
It occurs as a crystal with red- violet type colour.
The shape of the cobalt silicate crystal is orthorhombic.
The molecular weight of cobalt silicate is 209.95.
The melting temperature of Cobalt Silicate is 1618 degrees Celsius.
The density of Cobalt Silicate is 4.63 grams per centimetre cube.
Cobalt Silicate can serve as a semi-conductor.
Positive charge the proton give to the nucleus center of an atom
Answer: Option (3) is the correct answer.
Explanation:
A reaction due to which there occurs change in chemical composition of reactants is known as a chemical reaction.
For example, evolution of heat when two substances combine together shows a chemical reaction has taken place between the substances.
Whereas a reaction which does not bring any changes in chemical composition of the reactants is known as a physical reaction.
For example, boiling point, melting point, mass, volume etc are all physical properties.
Thus, we can conclude that out of the given options a substance melts when sitting in the Sun, is not an indication of a chemical reaction.
I think this is true because they’re in the same layer, strata which would mean they died around the same time. Hope this helps sorry if it’s wrong!
Answer:
(b) 2-chloro-3,3-dimethylpentane
Explanation:
A rearrangement occurs in a SN1 reaction when the carbocation is formed. More substituted carbocations are more stable because of the electron-donating effect of alkyl groups and the hyperconjugation.
An alkyl halide with a carbon more substituted than the carbon where is the C-X bond, is most likely to undergo rearrangement.
(a) 1-bromo-4-methylcyclohexane
In this molecule could occur a rearrangement but the carbocation need to jump three bonds.
(b) 2-chloro-3,3-dimethylpentane
This alkyl halide is most likely to occur a rearrangement because the near carbon is a quaternary carbon.
(c) 3-bromopentane
Can't occur a rearrangement because all carbons are secondary
(d) bromocyclohexane
Also, can't occur a rearrangement because all carbons are secondary.
Thus, the most likely to undergo rearrangement in an SN1 reaction is (b) 2-chloro-3,3-dimethylpentane
I hope it helps!
