mass of CaCo3 is calculated as follows
calculate the moles of CaCO3 by use of Avogadro constant
that is 1 moles = 6.02 x10^23 molecules
what about 5.11 x10^25 molecules
by cross multiplication
= 1 mole x ( 5.11 x10^25) /( 6.02 x10^23) = 84.88 moles
mass = mole x molar mass
the molar mass of CaCO3 = 40.078 + 12.011+ (3 x15.999) = 100.086 g/mol
mass is therefore = 84.88 moles x 100.086 g/mol= 8495.3 grams
