Answer:
<h2>2Na(g) + Cl2 (g) --> 2NaCl(s)</h2>
Explanation:
- Such type of chemical reaction in which change in oxidation state takes place due to loss and gain of electrons is known as a redox reaction.
- Such type of the species that lose electron is called reducing agent and the process is known as oxidation because the species is oxidized by losing an electron and thus acts as a reducing agent.
- Such type of the species that gain electron is called an oxidizing agent and the process is known as reduction because the species is reduced and thus acts as the oxidizing agent.
- In the given options, only the oxidation number changes in the reaction such as , so it is a form of the redox reaction.
- In this reaction, Na atom changes into ion and the Cl atom converts into ion that means a change in oxidation states occurs 0 to +1 in the case of Na atom and 0 to -1 in the case of Cl atom. In others options, there is no change in the oxidation state so they are not redox reactions.
Answer : The molar concentration of ethanol in the undiluted cognac is 8.44 M
Explanation :
Using neutralization law,
where,
= molar concentration of undiluted cognac = ?
= molar concentration of diluted cognac = 0.0844 M
= volume of undiluted cognac = 5.00 mL = 0.005 L
= volume of diluted cognac = 0.500 L
Now put all the given values in the above law, we get molar concentration of ethanol in the undiluted cognac.
Therefore, the molar concentration of ethanol in the undiluted cognac is 8.44 M
Answer:
Use a commercially produced charcoalfilter
Explanation:
Water found in streams, depressions and ground water must be contaminated with pathogenic microorganisms. The methods of disinfection using iodine or bleach or boiling the water for about two minutes and then filtering it with a clean cloth will effectively remove the microorganisms.
However, charcoal filters do not eliminate microorganisms from water hence this method is not acceptable in this case.
energy is required to move from one state or phase of matter to the next. Energy is used to make a liquid into a gas or a solid into a liquid.
Answer:
The location of the electrons in the Thomson's plum pudding model of the atom are contained in orbitals. These orbitals are what make the element stable or unstable