Most photos we see of Enya are the photos in the album booklets, or photos from magazines. As it is with all artists, Enya wears cosmetics in these photos, and sometimes the photos might be retouched to create a certain look.
Introduction Heat of formation is the enthalpy change when one mole of product is formed from its constituent elements under standard conditions. The equation for the formation of calcium carbonate from its elements under standard conditions is Ca(s)+C (graphite)+O2 (g) CaCO3(s).HfO (CO2 (g)) = -393.5 kJ mol -1 ?HfO (H2O (l)) = -285.5 kJ mol -1 Heat of formation of calcium carbonate = ?H1 + ?Hf (CO2 (g)) +?Hf (H2O (l))- ?H2 = -421+(-393.5)+(-285.5)- (-17.6) = -1082.4 kJ mol -1 In order to achieve the answer, Hess's law is used.
The chemical formula of calcium carbonate is CaCO3; calcium carbonate contain calcium, carbon and oxygen.t is made up of carbon, oxygen and calcium. A carbonate contains oxygen and carbon so you know that, and then you can see that as it is called calcium carbonate it also conta â¦ ins calcium. :).