yes, calcium (Ca), Carbon (C) and Oxygen (O)
calcium carbonate
The equation for the reaction is H2SO4 + CaC03 = CO2 + H2O + CaSO4.
Carbon dioxide(CO2) + Lime Water[Ca(OH)2] → Calcium Carbonate(CaC03) + Water(H2O)
The equation CaCO3 -> CaO + CO2 is an example of a decomposition reaction.
calcium carbonate
Calcium carbonate?
The equation for the reaction is H2SO4 + CaC03 = CO2 + H2O + CaSO4.
Carbon dioxide(CO2) + Lime Water[Ca(OH)2] → Calcium Carbonate(CaC03) + Water(H2O)
I assume you meant calcium carbonate, CaCO3, since "cac03" makes no sense. It's chalk. You can eat it if you want (it's not actually poisonous), but it's going to be hard to chew, and in significant quantities it's not going to be good for you.
There are 7 atoms: 1 calcium, 2 carbon, and 4 oxygen.
Scum is created when calcium ions (and or magnesium ions) form an insoluble precipitate with soap. Soap consists of sodium salts of fatty acids. e.g. sodium stearate (aq) + calcium ions (aq) = calcium stearate (s) + sodium ions (aq) Scum is the calcium stearate. Limescale is created when hard water i heated, or when it evaporates. It is formed because calcium hydrogen carbonate is unstable. Ca(HCO3)2 (aq) + heat = Cac03 (s) +H20 (l) +CO2 (g) calcium hydrogen carbonate + heat = calcium carbonate + water + carbon dioxide
CaC03
The equation CaCO3 -> CaO + CO2 is an example of a decomposition reaction.
metal oxide and carbon dioxide Na2CO3(s) + heat -----> Na2O(s) + CO2(g) [not decomposed in normal conditions as Na2CO3 is very stable] MgCO3(s) + heat -----> MgO(s) + CO2(g) CoCO3(s) + heat -----> CoO(s) + CO2(g) CuCO3(s) + heat -----> CuO(s) + CO2(g) these are some examples from which you can get help.