Question
The relative formula mass (M_(r)) of carbon monoxide (CO) is 28. If the relative atomic mass of carbon is 12 , what is the relative atomic mass of oxygen? Enter a number
Answer
4.6
(230 Votes)
Ellis
Elite · Tutor for 8 years
Answer
16
Explanation
The relative formula mass (Mr) of a compound is the sum of the relative atomic masses (Ar) of the atoms in its formula. According to the question, the relative formula mass (Mr) of carbon monoxide (CO), an compound consisting of one carbon atom and one oxygen atom, is stated to be 28. We are also given the relative atomic mass of carbon, which is 12. To obtain the relative atomic mass of oxygen, we should subtract the atomic mass of carbon from the formula mass of carbon monoxide.