Question

Which of the following compounds has the largest percent by mass of oxygen?

Select one:
a. CO
b. CH2O
c. CO2
d. C6H12O6

Answer 1

Carbon dioxide (CO2) has the largest percent by mass of oxygen among the given options with 72.71%.

Step-by-step explanation:

The question is asking which of the given compounds has the largest percent by mass of oxygen. To answer this, we will calculate the percent by mass of oxygen in each of the compounds: CO, CH2O, CO2, and C6H12O6.

Calculations:

• CO: Molar mass = 12.01 g/mol (C) + 16.00 g/mol (O) = 28.01 g/mol. Percent oxygen = (16.00/28.01) * 100% = 57.16%
• CH2O: Molar mass = 12.01 g/mol (C) + 2 x 1.008 g/mol (H) + 16.00 g/mol (O) = 30.03 g/mol. Percent oxygen = (16.00/30.03) * 100% = 53.28%
• CO2: Molar mass = 12.01 g/mol (C) + 2 x 16.00 g/mol (O) = 44.01 g/mol. Percent oxygen = (32.00/44.01) * 100% = 72.71%
• C6H12O6: Molar mass = 6 x 12.01 g/mol (C) + 12 x 1.008 g/mol (H) + 6 x 16.00 g/mol (O) = 180.16 g/mol. Percent oxygen = (6 x 16.00/180.16) * 100% = 53.29%

Among the compounds listed, CO2 (carbon dioxide) has the largest percent by mass of oxygen at 72.71%.