If the farmer were to use dry firewood with an average energy density of 16 MJ/kg, how many kilograms of wood would the farmer need to use to raise the water in the drum by the same amount as in (b)?

n+h→nh3

we must remember that nitrogen and hydrogen are both diatomic molecules in their standard gas form. this adjusts the equation to

n2+h2→nh3

now we need to adjust coefficients in order to balance the atoms on each side of the equation. currently we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.

we can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.

n2+3h2→2nh3

this gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

fe 55.85 g/mol and h2o 18.02 g/mol.