What is the mass of the of substance in a beaker that contains 19 moles of pbi2

8759g

Explanation:

Given parameters:

Number of moles  = 19moles

Unknown:

Mass of PbI₂  = ?

Solution:

To solve this problem, we first find the molar mass of PbI₂;

   Molar mass of PbI₂   = 207.2 + 2(126.9) = 461g/mol

 Mass of  PbI₂ = number of moles x molar mass  = 19 x 461

                       = 8759g

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).