Explain the relationship between mutations, adaptations, natural selection, and extinction.
2 answers:
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Taking into account definition of percent yield, the percent yield for the reaction is 100%.
<h3>Reaction stoichiometry</h3>In first place, the balanced reaction is:
2 FeBr₃ + 3 Na₂S → Fе₂S₃ + 6 NaBr
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
- FeBr₃: 2 moles
- Na₂S; 3 moles
- Fе₂S₃: 1 mole
- NaBr: 6 moles
The following rule of three can be applied: if by reaction stoichiometry 2 moles of FeBr₃ form 6 moles of NaBr, 2.36 moles of FeBr₃ form how many moles of NaBr?
moles of NaBr= 7.08 moles
Then, 7.08 moles of NaBr can be produced from 2.36 moles of FeBr₃.
<h3>Percent yield</h3>The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.
The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:
where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
<h3>Percent yield for the reaction in this case</h3>In this case, being the molar mass of NaBr 102.9 g/mole, you know:
- actual yield= 7.08 moles× 102.9 g/mole= 728.532 grams
- theorical yield= 7.08 moles× 102.9 g/mole= 728.532 grams
Replacing in the definition of percent yields:
Solving:
<u><em>percent yield= 100%</em></u>
Finally, the percent yield for the reaction is 100%.
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Answer: Option "Has polar bonds and is a non-polar molecule" is the correct answer.
Explanation:
A covalent compound is defined as the compound in which there will be sharing of electrons between the combining atoms.
An ionic compound is defined as the compound in which there will be transfer of electrons from one atom to another.
- A non-polar covalent compound is defined as the compound in which there will be equal sharing of electrons between the combining atoms.
For example, a chlorine atom has 7 valence electrons.
So, when a chlorine atom chemically combines with another chlorine atom then there occurs equal sharing of electrons.
Hence, molecule is formed which is non-polar covalent compound in nature with non-polar covalent bond.
- A polar covalent bond is defined as the bond in which there will be unequal sharing of electrons between the combining atoms.
For example, a carbon atom has 4 valence electrons and an oxygen atom has 6 valence electrons.
To complete their octet a carbon atom needs 4 more electrons and an oxygen atom needs 2 more electrons.
And, when one carbon and two oxygen atoms chemically combine together then there occurs unequal sharing of electrons.
Hence, a polar covalent compound is formed.
Since, oxygen is more electronegative than carbon atom. Hence, dipoles in the linear carbon dioxide molecules will cancel out each other.
Therefore, a carbon dioxide molecule is non-polar compound that has polar covalent bonds.
Thus, we can conclude that the statement, has polar bonds and is a non-polar molecule, correctly describes carbon dioxide.