<span>By using the mole ratio, we can determine that 2 moles of NH3 are made when 3 moles of hydrogen gas are present. The numbers in front of the chemicals tell us the relative amounts consumed and produced. Since there is a 3 in front of H2 and a 2 in front of NH3, this tells us that for every 3 moles of H2 gas used, 2 moles of NH3 are made.</span>
An ionic compound can be formed through the existence of valency above the compound e.g NH4 which have +3 as it's ionic charge
evaporation. When a substance undergoes a change of matter from a solid to gas, it is the process of evaporation.
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The enthalpy of atomization (also atomisation in British spelling) is the enthalpy change that accompanies the total separation of all atoms in a chemical substance (either a chemical element or a chemical compound)
Answer:
burning of wood ,cooking an egg,baking a cake,rusting of iron,digestion of food .
