CH4 + 2O2 —> 2H2O + CO2 How many moles of carbon dioxide are obtained when 20. moles of methane are
burned?

 20 mol CH4 x 1CO2 / 1CH4 = 20mol  CO2

20mol CO2

Explanation:

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.