Is this the whole answer?
Period are going left to right across the periodic table
Groups are going up to down on the periodic table
methanol:
1 mole CH3 OH --> produces --> 1 mole CO2
1 mole CO2 has a molar mass of 44.01 gh/mole
your set up is:
(44.01 g CO2) / -726.5kJ = 0.06058g
your answer 0.06058 grams of CO2 produced per kJ released.
Most reasonable answer:
Observations and experimentation
D. As more electrons are added to an element, the number of electron orbitals being filled increases