To determine which compound contains the greatest percent of oxygen by mass, we need to calculate the molar mass of each compound and the mass contributed by oxygen.

1. SiO2: The molar mass of SiO2 is approximately 60.08 g/mol (28.09 g/mol for Si and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/60.08)*100 = 53.26%.

2. CO2: The molar mass of CO2 is approximately 44.01 g/mol (12.01 g/mol for C and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/44.01)*100 = 72.71%.

3. SO2: The molar mass of SO2 is approximately 64.07 g/mol (32.07 g/mol for S and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/64.07)*100 = 49.95%.

4. NO2: The molar mass of NO2 is approximately 46.01 g/mol (14.01 g/mol for N and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/46.01)*100 = 69.55%.

Therefore, CO2 contains the greatest percent of oxygen by mass.

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To determine which compound contains the greatest percent of oxygen by mass, we need to calculate the molar mass of each compound and the mass contributed by oxygen.

1. SiO2: The molar mass of SiO2 is approximately 60.08 g/mol (28.09 g/mol for Si and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/60.08)*100 = 53.26%.

2. CO2: The molar mass of CO2 is approximately 44.01 g/mol (12.01 g/mol for C and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/44.01)*100 = 72.71%.

3. SO2: The molar mass of SO2 is approximately 64.07 g/mol (32.07 g/mol for S and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/64.07)*100 = 49.95%.

4. NO2: The molar mass of NO2 is approximately 46.01 g/mol (14.01 g/mol for N and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/46.01)*100 = 69.55%.

Therefore, CO2 contains the greatest percent of oxygen by mass.

Knowee AI · Accepted Answer

To determine which compound contains the greatest percent of oxygen by mass, we need to calculate the molar mass of each compound and the mass contributed by oxygen.

1. SiO2: The molar mass of SiO2 is approximately 60.08 g/mol (28.09 g/mol for Si and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/60.08)*100 = 53.26%.

2. CO2: The molar mass of CO2 is approximately 44.01 g/mol (12.01 g/mol for C and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/44.01)*100 = 72.71%.

3. SO2: The molar mass of SO2 is approximately 64.07 g/mol (32.07 g/mol for S and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/64.07)*100 = 49.95%.

4. NO2: The molar mass of NO2 is approximately 46.01 g/mol (14.01 g/mol for N and 16.00 g/mol for each of the two O atoms). The mass contributed by oxygen is 32.00 g/mol. So, the percent of oxygen by mass is (32.00/46.01)*100 = 69.55%.

Therefore, CO2 contains the greatest percent of oxygen by mass.

Which compound contains the greatest percent of oxygen by mass?Group of answer choicesSiO2 CO2SO2NO2

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