3. Given: - 99.97 g chromium - 204.47 g chlorine - 184.56 g oxygen Wanted: percent composition by mass?

To find the percent composition by mass of chromium, chlorine, and oxygen in the given mixture, we need to calculate the percentage of each element in the mixture. Given: - Mass of chromium = 99.97 g - Mass of chlorine = 204.47 g - Mass of oxygen = 184.56 g Total mass of the mixture = Mass of chromium + Mass of chlorine + Mass of oxygen Total mass of the mixture = 99.97 g + 204.47 g + 184.56 g Total mass of the mixture = 489.00 g Now, we can calculate the percentage of each element in the mixture: - Percentage of chromium = (Mass of chromium / Total mass of the mixture) * 100 - Percentage of chlorine = (Mass of chlorine / Total mass of the mixture) * 100 - Percentage of oxygen = (Mass of oxygen / Total mass of the mixture) * 100 Let's calculate the percentages: Calculate the value by following steps: - step0: Calculate: \(\left(\frac{99.97}{489}\right)\times 100\) - step1: Divide the terms: \(\frac{9997}{48900}\times 100\) - step2: Reduce the numbers: \(\frac{9997}{489}\times 1\) - step3: Multiply: \(\frac{9997}{489}\) Calculate or simplify the expression \( (204.47 / 489.00) * 100 \). Calculate the value by following steps: - step0: Calculate: \(\left(\frac{204.47}{489}\right)\times 100\) - step1: Divide the terms: \(\frac{20447}{48900}\times 100\) - step2: Reduce the numbers: \(\frac{20447}{489}\times 1\) - step3: Multiply: \(\frac{20447}{489}\) Calculate or simplify the expression \( (184.56 / 489.00) * 100 \). Calculate the value by following steps: - step0: Calculate: \(\left(\frac{184.56}{489}\right)\times 100\) - step1: Divide the terms: \(\frac{1538}{4075}\times 100\) - step2: Reduce the numbers: \(\frac{1538}{163}\times 4\) - step3: Multiply: \(\frac{1538\times 4}{163}\) - step4: Multiply: \(\frac{6152}{163}\) The percent composition by mass of chromium, chlorine, and oxygen in the given mixture is: - Chromium: 20.44% - Chlorine: 41.81% - Oxygen: 37.74%