Which of the following accounts for the fact that reactions between ions in solution are usually very fast?

○ bonds are weak

○ No covalent bonds need to be broken for reaction to occur.

○ Reactions between lons are endothermia.

○ Reactions between are exothermic.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

the answer is na (sodium)