Concept explainers
Billions of pounds of urea,
By assuming unlimited amounts of CO2, how many moles of urea can be produced from each of the following amounts of
Interpretation:
The number of moles of urea is to be determined in the given amounts of
Concept introduction:
The characteristic mass of a compound is the formula mass of the compound, which is obtained by adding the atomic masses of all atoms.
A conversion factor is a numerical ratio, which is used to change one unit into another.
The chemical formula represents the precise number of atoms in a molecule, but not their structural arrangement.
Answer to Problem 54E
Solution: The number of moles of urea present in the molecules is given as follows:
Explanation of Solution
a)
The equivalence is obtained between moles of
In order to obtain the moles of urea, the conversion factor proceeds as follows:
Therefore, the number of moles of urea is
b)
The equivalence is obtained between moles of
In order to obtain the moles of urea, the conversion factor proceeds as follows:
Therefore, the moles of urea are
c)
The equivalence is obtained between grams of
The equivalence is obtained between moles of
In order to obtain the moles of urea, the conversion factor proceeds as follows:
Here,
Therefore, the moles of urea are
d)
The equivalence is obtained between grams of
The equivalence is obtained between moles of
In order to obtain the moles of urea, the conversion factor proceeds as follows:
Here,
Therefore, the moles of urea are
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Chapter 4 Solutions
Chemistry In Focus
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