Here's link to the answer:
bit.
ly/3a8Nt8n
 
        
             
        
        
        
Explanation:
Given problem: 
Find the molar mass of: 
   SO₃ and C₁₀H₈
Solution: 
The molar mass of a compound is the mass in grams of one mole of the substance. 
To solve this, we are going to add the individual atomic masses of the elements in the compound;
   Atomic mass; 
        S = 32g/mol; O = 16g/mol; C = 12g/mol and H = 1g/mol 
For  SO₃;
      = 32 + 3(16)
      = 32 + 48 
      = 80g/mol 
For C₁₀H₈
       = 10(12) + 8(1)
       = 120 + 8 
        = 128g/mol
 
        
             
        
        
        
N₂O₃
3 moles oxgyen atoms in 1 mole .
hope this helps!