Answer:
Co(NO3)2 isthe right answer
Explanation:
hope it helped u a lot
Answer: 29.89mL of HClO4 is needed
Explanation: Please see the attachments below
Arsenic is a pure element. Elements (atoms) are the simplest building blocs excluding smaller elementary particles such as electrons, neutrons, quarks, protons etc.
This means that Arsenic can not be broken down any further by chemical change, only nuclear decay can cause the breakdown of large elements into smaller ones. Chemical change would be the combination of multiple elements into a compound or the decomposition of a molecule/compound into pure elements or smaller compounds.
Alpha particles cannot penetrate deeply into solids because they have low velocity. This should be correct. :D
A few examples of changes in chemical change are, a change in the color of the chemical, change in the energy or temperature, and lastly change of odor.
Hope I could help! :)
