Answer:
[tex]1.49\cdot 10^{-21} mol[/tex]
Explanation:
1 mole of a substance is defined as the amount of substance containing a number of units of the substance equal to the Avogadro number:
[tex]N_A = 6.022\cdot 10^{23} mol^{-1}[/tex]
This means that 1 mole of paper will contain a number of sheets equal to the Avogadro number,
[tex]N_A = 6.022\cdot 10^{23} mol^{-1}[/tex]
In this case, instead, the number of sheets in this amount of paper is
N = 897
Which corresponds to n moles.
Therefore, we can solve the problem by using the rule of three:
[tex]\frac{1 mol}{N_A}=\frac{n}{N}[/tex]
And solving for n,
[tex]n=1 mol \cdot \frac{N}{N_A}=1 mol \cdot \frac {897}{6.022\cdot 10^{23}}=1.49\cdot 10^{-21} mol[/tex]
