It is an example of chemical weathering.
Because the carbon dioxide mixed with the air changes the chemical composition of limestone.
Hope it helps.
The mass is 132.0384 grams.
An explosion is a sudden release of enormous energy, being released all at once, particularly from a trapped container. The enormous amount of energy being released expands rapidly, more than the air can adjust around them, which makes the sound you hear and the fast light that you see is the energy being released.
