Question

What is the percent of O in CO2

Answer 1

72.71 . simple google search, you shouldnt waste points

Answer 2

For this case we have the
`CO_ {2}`

It is composed of one atom of carbon and two of oxygen.

The atomic mass of carbon and oxygen, which can be found in a periodic table, are given by:

`C: 12 \frac {g} {mol}\\O: 16 \frac {g} {mol}`

Then, we find the atomic mass of
`CO_(2)`:

`1 * 12 \frac {g} {mol} = 12 \frac {g} {mol}\\2 * 16 \frac {g} {mol} = 32 \frac {g} {mol}`

Adding we have:

`44 \frac {g} {mol}`

To find the percentage of oxygen, we divide the atomic mass of the two oxygen atoms between that of
`CO_(2):`

`\frac {32} {44} * 100 = 72.73`%

Thus, the percentage of oxygen is 72.73%

Answer:

72.73%