Question

The atomic mass of $Cl$ is $35.45$ $(amu)$ and the atomic mass of $Al$ is $26.98$ $(amu)$ . What are the masses $grams$ of $4.000$ $mol$ $Al$ atoms and $4.000$ $mol$ $Cl$ atoms?

Answer 1

Hint: The Molar mass is the mass of one substance. The Molar mass is its atomic weight on the Periodic table $g/mol$ . Molecular mass is the measure of mass related to the molecule. It is likewise called atomic weight. It tends to be determined by including the mass of every atom.

Complete answer:
Conversion of the $Moles$ Chlorine into $grams$ Chlorine.
The number of $Moles$ Chlorine $(Cl)$ is $4.000$ $mol$ of $Cl$.
The atomic mass of Chlorine $(Cl)$ is = $35.45$ $amu$ ≈ $35.45$ $g/mol$ .
Multiply the number of $moles$ chlorine with the conversion factor $\left( {\dfrac{{35.45gCl}}{{1molCl}}} \right)$ obtained from the atomic mass $Cl$to calculate the atomic mass of 4 $moles$ $Cl$ atoms.
Mass of $4$ $moles$ $Cl$atom is
= $4molCl \times \dfrac{{35.45gCl}}{{1molCl}}$
= $141.8$ $g$ of $Cl$.
Therefore, the mass of $4$ $moles$ $Cl$ atom is =$141.8g$
Conversion of the $Moles$ of Aluminium into $grams$ of Aluminium.
The number of $Moles$ Aluminium $(Al)$ is $4.000$ $mol$ of $Al$.
The atomic mass of Aluminium $(Al)$ is = $26.98$ $amu$ ≈ $26.98$ $g/mol$.
Multiply the number of $moles$ chlorine with the conversion factor $\left( {\dfrac{{26.98gAl}}{{1molAl}}} \right)$ obtained from the atomic mass $Al$ to calculate the atomic mass of $4$ $moles$ $Al$atom.
Mass of $4$ $moles$ $Al$ atom is= $4molAl \times \dfrac{{26.98gAl}}{{1molAl}}$
= $107.9$ $g$ of $Al$.
Therefore, the mass of $4$ $moles$ $Al$ atom =$107.9$ $g$

Additional information:
The mass of an individual atom of an element is known as its atomic mass. The molecular mass of a substance is the total atomic mass of the atoms.

Note :
The mass of an element is represented by the atomic mass, while the mass of a chemical compound is represented by the molecular mass. The molecular mass of a substance can be calculated by summing the atomic masses of its constituent atoms. The molar mass, on the other hand, is commonly calculated using standard atomic weights. As a result, the numerical values of molecular mass and molar mass differ somewhat and represent different entities.