Concept explainers
Interpretation:
This is to be explained how rolls can be used to count pennies also, how dimes are similar to moles.
Concept introduction:
In 1 mol of any substance, there are
Answer to Problem 87A
1 mole contains
1 roll of pennies contains 50 pennies
1 roll of dimes contains 50 dimes.
Explanation of Solution
According to the table, the value of roll of penny and dime is $0.50 and $5.00 respectively.
As per the currency rules, 1 penny is equal to $0.01. Thus, if value of roll of penny is $0.50, the number of pennies in the roll will be:
Now, 1 dime is equal to $0.1. Thus, if value of roll of dime is $5.00, the number of dime in the roll will be:
Therefore, one roll of pennies contains 50 pennies and one roll of dimes contains 50 dimes.
Also, a mole contains
Rolls can be used for counting pennies and dimes are similar to mole because each of them specifies a constant quantity.
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