Question

Amixture was found to contain 1.50 g `NH_4Cl`, 0.80 g `NaCl`, and 1.20 g `SiO_2`. What is the percentage of sand in this mixture?

Answer 1

`"Percentage of sand"` `=` `"Mass of sand"/"Mass of mixture"xx100%`

Explanation:

`"Percentage of sand"` `=` `(1.20*g)/(1.20*g+1.50*g+0.80*g)xx100%` `~=` `30%?`