Alexander Fleming discovered a new type of medicine (penicillin) that could treat infections.
Hydrogen and oxygen cn form a polar covalent bond
Answer:
Explanation:
The concept of Lewis Acid and base was applied in determining the product formed from the reaction of the lewis acid and the lewis base.
According to G.N Lewis - an american who worked and elaborated more on the definition of acids and bases. He defined an acid as an electron pair acceptor and a base as an electron pair donors.
One of the application of lewis theory is in the reaction to test for the presence of copper(ii) ions by the addition of ammonia to form a clear blue solution of tetraammine.
The reactions of the lewis acid to each of the base is as shown in the attached file.
86.7 kJ
<h3>
Further explanation</h3>
<u>Given:</u>
Molar mass (Mr) of ethanol = 46.07 g/mol
<u>Question:</u>
How much energy is required to vaporize 98.6 g of ethanol (C₂H₅OH) at its boiling point?
<u>The Process:</u>
Observe this . This means that 40.5 kJ of energy is required to vaporize every 1 mole of ethanol at its boiling point. Therefore we must first convert grams into moles.
<u>Question:</u>
Step-1:
Let us count the number of moles of 98.6 g of ethanol.
We obtain 2.14 moles of ethanol.
Step-2:
Let us calculate how much energy is required to vaporize 2.14 moles of ethanol at its boiling point.
The amount of energy required is
Thus, the amount of energy required to vaporize 98.6 g of ethanol at its boiling point is 86.7 kJ.
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Quick Steps
<h3>Learn more</h3>
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Keywords: how much, energy required, to vaporize, ethanol, C₂H₅OH, its boiling point, ΔHvap, molar mass, moles, converts, kJ/mol
Answer: Option (b) is the correct answer.
Explanation:
A covalent bond is defined as the bond that is formed by sharing of electrons between the two chemically combining atoms.
For example, in a molecule.
As the valency of each carbon atom is 4, valency of each hydrogen atom is 1, and valency of each oxygen atom is 2.
So, in each one outermost electron of carbon atom is shared by each one outermost electron of hydrogen atom.
The fourth outermost electron is shared by one outermost electron of oxygen atom and the other outermost electron of oxygen atom is shared by the hydrogen atom of -OH.
Hence, we can conclude that there are total 5 covalent bonds present in the formation of methyl hydroxide ( or methanol).