Carbon dioxide (co2) is a gaseous compound. calculate the percent composition of this compound. answer using three significant figures. what is the percent by mass of carbon? % what is the percent by mass of oxygen? %

Solution..


Let's calculate the mass of CO₂.

We have (12+(16*2))
= 12+32
=44gmol¯¹..

a. What is the percent by mass of carbon?

Mass of carbon /mass of CO₂ × 100%

12/44 × 100%

=27.3%...

b. What is the percent by mass of oxygen?

Mass of oxygen/mass of CO₂ × 100%

(2×16)/44 × 100%

32/44 × 100%

=72.7%

To check.. You'll add this two percentage compositions together and see of it gives 100%... If it does then we're good...

27.3%+72.7% = 100% Checked..

Hope this helped?