Answer:
Chemistry is the science of matter, its properties, structure, changes or reactions and the energy that accompanies these changes.
Are you referring to DNA?
Answer:
1. Ag+ precipitates. 2. Ca2+ precipitates. 3. Co2+ precipitates.
Explanation:
First AgBr is formed which is practically insoluble in water. CaBr2 and CoBr2 are soluble.
Then precipitates CaSO4. CoSO4 is soluble.
And then precipitates Co2(PO4)3 which is insoluble.
Answer:
b. source
Explanation:
The source is where something comes from. i.e. The source of sunlight is the sun.