Calculating the Decomposition of CaCO3 Calcium carbonate (CaCO3), an important component of coral reefs, can decompose when heated, forming calcium oxide (CaO) and carbon dioxide (CO2) according to the equation below: CaCO3 es002-1. Jpg CaO CO2 How many moles of CaO form when 98. 60 g CaCO3 decompose? 98. 60 g CaCO3 = mol CaO.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

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