To answer this question, you need to know <span>Graham's Law of Effusion/Diffusion formula. In this formula, the rate of diffusion/effusion would be influenced by the mass. As the molecule has bigger mass, the rate should be slower because it will be harder to pass the membrane. The calculation should be:</span>
<span>Rate 1 / Rate 2 = √[M2/M1] 
</span>4.11/1= √[M2/2] 
M2=33.78 g/mol
        
                    
             
        
        
        
Answer:
Because the density of water is one
 
        
             
        
        
        
First, we construct the reaction equation:
Na₂SO₃ + 2HCl → 2NaCl + SO₂ + H₂O
H₂SO₃ is formed as an intermediate but decomposes to water and SO₂ gas.
        
             
        
        
        
Answer:
357.475
Explanation:
First you need periodic table and you have to look for mass 
Fe = 3 x 55.845 = 167.535
P = 2  x 30.97 = 61.94
o = 4 x 2 so 8 oxygen =  8 x 16 = 128
 add all and you get 357.475