Answer :
To calculate the mass percentage of CaCO3 in a limestone sample, divide the mass of CaCO3 by the total mass of the limestone and multiply by 100, resulting in a mass percentage of 71.91% CaCO3.
The mass percentage of CaCO3 in the limestone sample can be calculated using the mass of the limestone (3.56 g) and the mass of CaCO3 it contains (2.56 g).
To find the mass percentage, you divide the mass of CaCO3 by the mass of the limestone and then multiply by 100 to get the percentage.
The calculation is as follows: (2.56 g CaCO3 / 3.56 g limestone) X 100 = 71.91%.
Therefore, the mass percentage of CaCO3 in the limestone sample is 71.91%.
