1. Ir a mixture contains 0.639 g NaCl, 0.350 g NHACI, & 0.851 g of SiO2, with due regar

Signiricant figures, what is the mass percent of NaCl in the mixture?

34.73%

Explanation:

We are given;

A mixture that contains;

NaCl = 0.639 g NH₄Cl = 0.350 g SiO₂ = 0.851 g

We are required to determine mass percent of NaCl in the mixture;

Step 1: Determine the total mass of the mixture;

Mass of the mixture = Mass of NaCl + Mass of NH₄Cl + Mass of SiO₂

= 0.639 g + 0.350 g + 0.851 g

= 1.84 g

Step 2: Calculate the mass percent of NaCl in the mixture

The mass % of NaCl = (Mass of NaCl : Mass of the mixture) 100

= (0.639 g : 1.84 g) * 100

= 34.73%

Therefore, the mass % of NaCl in the mixture is 34.73%