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%

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

Explanation:

We are given:

A chemical compound having chemical formula

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

Mass of silicon =

Mass of compound =

Putting values in above equation, we get:

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

gas

explanation:

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in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm