1. It is the generation of photoelectrons.
2. The existence of a threshold frequency.
Answer:
Number of iodine atoms = 2 × 4 = 8
Number of oxygen atoms = 2 × 9 = 18
Explanation:
Coefficient 2 is placed in front of the product tetraiodine nonaoxide:
= 
Number of iodine atom in a single molecule tetraiodine nonaoxide = 4
Number of oxygen atoms in a single molecule tetraiodine nonaoxide = 9
Coefficient 2 is placed in front of the product tetraiodine nonaoxide:
= 
Number of iodine atoms = 2 × 4 = 8
Number of oxygen atoms = 2 × 9 = 18
Answer:
( About ) 110 kilograms
Explanation:
Take a look at the attachment below,
1AlBr3+ 3K ---> 3KBr + 1Al
depend on which of them , they can have for example we have 1-buten ,2buten , iso buten(structural isomers) also they can have sterio isomers too