Answer:
Graphite is an electrical conductor, hence useful in such applications as arc lamp electrodes. It can conduct electricity due to the vast electron delocalization within the carbon layers (a phenomenon called aromaticity). These valence electrons are free to move, so are able to conduct electricity.
The way an experiment is carried is out is determined by the purpose of that experiment.
The answer is "A. a pure substance can be separated by chemical means, while a mixture can be separated by physical means". A pure substance only has one type of substance, whereas a mixture has more than one. A pure substance therefore, can only be separated chemically, because it is not two things mixed together, whereas a mixture can be separated physically because there are multiple substances.
Calcium Hydroxide (Ca(OH)2) can actually be formed by the
reaction of Calcium Oxide (CaO) with water (H2O). The complete balanced
chemical reaction is:
<span>CaO + H2O
--> Ca(OH)2</span>
<span>The subscript 2 in (OH) means that there are 2 O and 2 H
on the product side. Hence, the equation is balanced already.</span>
Answer: Option (a) is the correct answer.
Explanation:
A dissociation reaction is defined as the reaction in which a compound beaks down into two or more different parts.
For example, molecular formula of water is 
and when it dissociates then it given hydrogen ion and hydroxide ion.
Therefore, dissociation reaction for water is as follows.
Thus, we can conclude that out of the given options is the correct equation for the dissociation of water.
