Question

Han purple, a synthetic inorganic pigment developed in China in ancient times, has the chemical formula BaCuSi2O6. What is its percent by mass silicon? a. 18.0% b. 15.9% c. 27.2% d. 38.9% e. 7.96%

Answer 1

Answer: The mass percent of silicon in the given compound is 15.9 %

Step-by-step explanation:

We are given:

A chemical compound having chemical formula
`BaCuSi_2O_6`

To calculate the percent by mass of silicon in given compound, we use the equation:

`\text{Mass percent of Silicon}=\frac{\text{Mass of silicon}}{\text{Mass of compound}}* 100`

Mass of silicon =
`(2* 28)=56.2g`

Mass of compound =
`[137.33+63.55+(2* 28.1)+(6* 16)]=353.08g`

Putting values in above equation, we get:

`\text{Mass percent of silicon}=(56.2)/(353.8)* 100\\\\\text{Mass percent of silicon}=15.9\%`

Hence, the mass percent of silicon in the given compound is 15.9 %