Question

A mixture was found to contain 3.50 g of sugar, 4.80 g of NaCl, and 7.20 g of sand. What is the percentage of sand?

Answer 1

First get the sum of the mass of each substance.

total mass = 3.50 g + 4.80 g + 7.20 g

total mass = 15.50 g

 

The percentage mass would be:

% mass = (7.20 g / 15.50 g) * 100%

% mass = 46.45%