Final answer:
To calculate the mass percentage of an element in a compound, we divide the mass of that element in one mole of the compound by the compound's molar mass and multiply by 100%. The question was for SiCl2Br2, but the example provided was for sulfuric acid (H2SO4).
Step-by-step explanation:
The student's question pertains to the calculation of the mass percentage of chlorine (Cl) in SiCl2Br2. However, the reference information provided relates to the mass percentage calculation of different elements, especially in the context of sulfuric acid (H2SO4) and other chlorine-containing compounds. To calculate the mass percentage of an element in a compound, you would divide the total mass of the element in one mole of the compound by the molar mass of the compound, and then multiply the result by 100%.
Let's consider an example with sulfuric acid (H2SO4), where we calculate the mass percentage of sulfur (S). First, determine the molar mass of sulfuric acid: H (1.01 g/mol) x 2 + S (32.07 g/mol) x 1 + O (16.00 g/mol) x 4 = 98.09 g/mol. Next, calculate the mass percentage of sulfur: (32.07 g/mol / 98.09 g/mol) x 100%.
Although we are unable to calculate the mass percentage of chlorine in SiCl2Br2 without its molar mass, I can guide you through the process using the similar concept as shown above.