Chemical because the propane has stored chemical energy which is being released and a by-product of that propane is heat or themal energy.
Answer:
All other units are gotten from them
Use the molar mass of ammonia to change the grams to moles and then use mole-mole ratio
100. g NH3 (1 mol NH3/ 17.04 g) (3 mol H2/ 2 mol NH)= 8.80 moles H2
