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CaCo3 decomposes to give Co2 gas according to the equation CaCo3(s) gives CaO(s)+Co2(g).calculate the mass of CaO(s)produced on complete decomposition of 5.0g of CaCo3.given molar masses of CaO=56g,Co2=44g.

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Solution

Dear Student,

Moles=MassMolar massMolar mass of CaCO3=Molar mass of CaO+Molar mass of CO2 =56+44=100 gTherefore, Moles of CaCO3=5100=0.05 molesCaCO3(s) CaO(s) + CO2(g)1 mol of CaCO3 gives 1 mol of CaOSo, 0.05 mol of CaCO3 will give 0.05 mol of CaOMass of CaO=No. of moles×molar mass=0.05×56=2.8 g

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