Answer:
1.914 mol
Explanation:
Use the following convert to convert mass to moles.
Moles = [tex]\frac{mass}{molar mass}[/tex].
Given,
Mass of PbS = 458 g
Molar mass of PbS = 239.3 g/mol
Moles of PbS = [tex]\frac{Mass of PbS}{Molar mass of PbS }[/tex]
= [tex]\frac{458 g}{239.3 g/mol }[/tex]= 1.914 mol
1.914 moles of PbS are equivalent to 458 g PbS
