Calcium carbonate, CaCO3\text{CaCO}_3CaCO3, decomposes to make calcium oxide, CaO\text{CaO}CaO.
Carbon dioxide is a waste product.
CaCO3→CaO+CO2 \text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2 CaCO3→CaO+CO2Relative formula mass (MrM_rMr): CaO=56.1\text{CaO} = 56.1CaO=56.1, CO2=44.0\text{CO}_2 = 44.0CO2=44.0
What is the atom economy of the reaction to produce calcium oxide?
Use the equation:
atom economy=Mr of desired producttotal Mr of all products×100 \text{atom economy} = \frac{M_r \text{ of desired product}}{\text{total } M_r \text{ of all products}} \times 100 atom economy=total Mr of all productsMr of desired product×10044.0%44.0\%44.0%
56.0%56.0\%56.0%
78.4%78.4\%78.4%
127.5%127.5\%127.5%