Mass spectrum exercises

Identify each peak of the spectrum. Click on each peak for assistance. Why is there two sets of peaks?
The carbon dioxide 1+ ion The carbon monoxide(CO) 1+ ion The oxygen 1+ ion The carbon 1+ ion

Identify each peak of the spectrum. Click on each peak for assistance.
Click to have more information on the formation of the mass spectrum of carbon dioxide.
Identify each peak of the spectrum. Click on each peak for assistance.
 

HCl with a charge of 1+ and an isotopic mass of chlorine of 37. HCl with a charge of 1+ and an isotopic mass of chlorine of 35. The chlorine ion with a charge of 1+ and a mass of 35 HCl with a charge of 1+ and an isotopic mass of chlorine of 36. This group of peaks is due to the 2+ ions of the species forming the peaks on the right. The 1+ hydrogen ion The oxygen molecule with a charge of 1+ The oxygen molecule with a 2+ charge The oxygen atom with a charge of 2+