Question

how is limestone formed in the oceans? when fluoride ions in the river reacts with dissolved carbon in water, it will form calcium carbonate, which on deposition on the ocean floor becomes a limestone. when carbonic acid ions in the river reacts with dissolved carbon in water, it will form calcium carbonate, which on deposition on the ocean floor becomes a limestone. when carbonic acid ions in the river reacts with dissolved calcium carbonate in water, it will form carbon, which on deposition on the ocean floor becomes a limestone. when calcium ions in the river reacts with dissolved carbon in water, it will form calcium carbonate, which on deposition on the ocean floor becomes a limestone.

Explanation:

Limestone is a sedimentary rock composed mainly of calcium carbonate. Calcium ions in rivers react with dissolved carbon (in the form of carbonates) in water to form calcium carbonate. This calcium - carbonate then deposits on the ocean floor and over time forms limestone.

Answer:

When calcium ions in the river reacts with dissolved carbon in water, it will form calcium carbonate, which on deposition on the ocean floor becomes a limestone.