Answer:
2.9 g
Step-by-step explanation:
The balanced chemical equation is
CaCO3 --------> CaO + CO2
The amount of CaCO3 is,
32.4 g - 27.3 g = 5.1 g
Change grams to moles,
Mole = 5.1 g / 100.09 g/mol
Moles = 0.0509
The mole ratio of CaCO3 and CaO is 1:1. Hence, 0.0509 mole of CaO will produce.
Now, convert 0.0509 mole to grams as,
Mass = Moles x M.Mass
Mass = 0.0509 mole x 56.08 g/mol
Mass = 2.8575 g or 2.9 g