How do you determine the mass of potassium in 33.5 g of KCl?

1 Answer
Jul 21, 2017

Answer:

Mass of potassium = #17.569 g#

Explanation:

Molar mass of KCl = #74.5513g*mol^-1#
Moles of KCl in the given sample = #33.5/74.5513mol#
We can easily see that #x# mol of KCl contains #x# mol of potassium atoms
Mass of potassium in given sample = moles of K #xx# molar mass of K =#33.5/74.5513 xx 39.0983# = #17.569 g #