Answer:
Explanation:
 Electrons are the negatively charged particles of an atom that are involved in chemical reactions. They are located outside the nucleus of an atom
 
        
             
        
        
        
The answer is: Plastic
Plastic is the result of the addition polymerization of poly(alkenes). Thus plastic is a synthetic organic material.
Hope it helped!
        
                    
             
        
        
        
Answer: (a) There are 0.428 moles present in 12 g of  molecule.
 molecule. 
(b) There are 2 moles present in  particles of oxygen.
 particles of oxygen.
Explanation:
(a). The mass of nitrogen molecule is given as 12 g. 
As the molar mass of  is 28 g/mol so its number of moles are calculated as follows.
 is 28 g/mol so its number of moles are calculated as follows.

So, there are 0.428 moles present in 12 g of  molecule.
 molecule. 
(b). According to the mole concept, 1 mole of every substance contains  atoms.
 atoms.
Therefore, moles present in  particles are calculated as follows.
 particles are calculated as follows.

So, there are 2 moles present in  particles of oxygen.
 particles of oxygen.