Question

The mass percentage of pencils in a collection of keys that weigh

132.456 g and a pencil that weighs 9.540 g is
%?

Answer 1

Mass Percent of Pencils = 7.20%

Step-by-step explanation:

The mass percent can be calculated using the following equation. In this case, the "solute" is the pencil and the "solution" is the collection of pencils.

mass solute
Mass Percent = ------------------------ x 100%
mass solution

9.540 g (pencil)
Mass Percent = -------------------------------------------- x 100%
132.456 g (pencil collection)

Mass Percent = 7.20%