The last answer choice us D. Adding more of the chemical will hear the water but only up to a certain temperature

D. Adding more of the chemical will heat the water but only up to a certain temperature

Chemical changes are changes in the process that produce new substances that are different from the initial/ forming substances. Chemical changes are usually known as chemical reactions. So there are products/reactions and reactants and there is a change in the molecule/particle

The chemical reaction is usually followed by the release of heat, gas, change in color, precipitate substance etc

The heat that occurs in the addition of chemicals is caused by the reaction with water. But there is a constant rise in temperature when water reaches its maximum capacity to react with these chemicals.

Evidenced by the addition of 15 g and 20 g of chemicals, the temperature changes are constant

the answer for sodium is 0.186

the answer for rubidium is 0.251

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.