Answer:
The atoms have been rearranged. To put it another way, it created a new substance.
1. Chemical
2. Physical
1. Exothermic
2. Endothermic
1. Chemical
2. Physical
Answer is (A)
Pottasium and Sodium salts are soluble in water. When these soaps are added to hard water. Hard water contains calcium or magnesium ions and they form Magnesium or Calcuim salts. These salts of magnesium and calcium precipitates out and are insoluble in water. This precipitation is called as dirt (the exact word for dirt is not acceptable here). This process is considered as the disadvantage of soap as well as using hard water.
Answer:
calcium to give calcium oxide to give calcium trioxocabonate (limestone) to give carbondioxide
Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules, which in turn form most of the objects around you.