1) Define the equation for calculating mass percent.
[tex]\text{Percent by mass=}\frac{\text{mass of solute}}{\text{mass of solution}}\cdot100[/tex]
2) The mass percent of chloroform
[tex]\text{Percent by mass of Chloroform=}\frac{3.90\text{ g of chloroform}}{3.90\text{ g + 19.4 g + 83.4 g }}\cdot100=\text{ 3.66\% chloroform}[/tex]
The mass percent of chloroform is 3.66% chloroform.
3) The mass percent of acetyl bromide
[tex]\text{Percent by mass of acetyl bromide=}\frac{19.4\text{ g acetyl bromide}}{3.90g\text{ + 19.4g + 83.4g}}\cdot100=\text{ 18.2\%}[/tex]
The mass percent of acetyl bromide is 18.2% acetyl bromide
4) The mass percent of heptane
[tex]\text{Percent by mass of heptane=}\frac{83.4g\text{ of heptane}}{3.90g\text{ +19.4g +83.4g}}\cdot100=\text{ 78.2\% of heptane}[/tex]
The mass percent of heptane is 78.2% of heptane
