how many gram of Co2 are formed for every gram of CH4 that combusts

Write the equation.

Balance it.
Convert 1 g CH4 to mols. mols = grams/molar mass.
Use the coefficients to convert from mols CH4 to mols CO2.
Convert mols CO2 to grams. g = mols x molar mass.

To determine the amount of CO2 formed for every gram of CH4 that combusts, we need to use the balanced chemical equation for the combustion of methane (CH4):

CH4 + 2O2 -> CO2 + 2H2O

From the chemical equation, we can see that 1 mole of CH4 reacts with 2 moles of O2 to produce 1 mole of CO2. The molar mass of CH4 is approximately 16 grams per mole, and the molar mass of CO2 is approximately 44 grams per mole.

Therefore, the ratio of CO2 to CH4 is 44 grams/16 grams = 11/4.

This means that for every gram of CH4 that combusts, approximately 11/4 grams (or 2.75 grams) of CO2 are formed.