If you have 17.4 grams of calcium nitrate hydrate and you heat it so that only 12.10 grams of the anhydrous salt remains, what is the mass of the water

Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

Idon’t know how to solve this question