Hey dude your ANSWER is=============================At STP, any gas has volume 22.4L for 1mol.So, 0.56L of CO2 = 1×0.5622.4=0.025 molNow, the reaction is:CaCO3 ⇌ CaO+CO2Reaction stoichiometryCompound Coefficient Molar Mass Moles WeightCaCO3 1 100 0.025 2.50CaO 1 56 0.025 1.40CO2 1 44 0.025 1.10So, the real amount of CaCO3 = 2.5 g But, since the SAMPLE is 50% pure, so actual amount of CaCO3 = 5gHope it helps you plzz MARK as brainliest
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