What is a gray rock composed of a number of different fossilized organisms such as crinoids, trilobites, and
brachiopods, you pour some hydrochloric acid on the rock and notice that it reacts to
the acid.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .