Question

a 12.50 g sample of a compound containing chlorine and oxygen is analyzed and found to have the mass percent composition given in the table below. what would the mass of each element be in a 100.0 gram sample of the same compound? element % composition mass of element in 100 grams of sample: cl 38.76% o 61.24%

Explanation:

Step1: Calculate mass of Cl

Mass of Cl = Mass percent of Cl × Total mass of sample
Mass of Cl = \(38.76\%\times100.0\space g=\frac{38.76}{100}\times100.0\space g = 38.76\space g\)

Step2: Calculate mass of O

Mass of O = Mass percent of O × Total mass of sample
Mass of O = \(61.24\%\times100.0\space g=\frac{61.24}{100}\times100.0\space g = 61.24\space g\)

Answer:

Cl: \(38.76\space g\), O: \(61.24\space g\)