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At high temperatures, calcium carbonate (CaCO3) decomposes to form calcium oxide (CaO) and carbon dioxide (CO2) gas. The average mass of 1 calcium oxide molecule is 56.079 amu, and the average mass of 1 carbon dioxide molecule is 44.009 amu.
CaCO3 CaO + CO2
Which is the total mass of the 1 calcium carbonate molecule?
A. 12.070 amu
B. 44.009 amu
C. 56.079 amu
D. 100.088 amu

Respuesta :

kenmyna

 The total  mass  of the  1 calcium carbonate  molecule  is 100.088 amu


 Explanation

CaCO3 → CaO  + Co2

According to law of mass  conservation in a chemical reaction  the mass  of the  product must be equal  to mass  of  product.

In  reaction  of decomposition of CaCO3,  CaCo3  is the reactant while CaO and Co2 are  the products

Therefore the  mass  of CaCO3   must be  equal  to  mass of CaO +CO2


mass of CaO + CO2 = 56.079 amu + 44.009 amu  = 100.088 amu

The  mass of CaCo3   is therefore = 100.088 amu

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