In which calcium carbonate dissociate when heat is given to it?

The nature of soluton when sodium carbonate is dissolved in water will be

25.3 g of sodium carbonate Na_2CO_3 is dissolved in enough water to make 250 ml of solution. If sodium carbonate dissociated completely, molar concentration of sodium ion, Na^+ and carbonate ions , CO_3^(2-) are respectively (Molar mass of Na_2CO_3=106gmol^-1) .

Can the addition of calcium carbonate to soil improve the growth ? How?

Cystoliths are crystals of calcium carbonate, while raphides are crystals of calcium oxalate.

The crystals of calcium carbonate, which appaer like a bunch of grapes in epidermal cells of the leaves of some plants are called.

Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk.