It is fact that 
6.023
×
10
23
 formula units of barium nitrate have a mass of 
16.6*10^23
⋅
g
. This is what we specify when we say molar mass. And thus the mass of 
5.30
×
10
22
 formula units of barium nitrate is the quotient multiplied by the molar mass:
5.30
×
10
22
6.023
×
10
23
m
o
l
×
16.6*10^23
⋅
g
⋅
m
o
l
−
1
        
                    
             
        
        
        
The mass of MgCl₂ produced is 5.685 grams.
<h3>What is mass?</h3>
Mass is the quantity of matter of a physical body.
The reaction is 
Mg   +   2HCl   →    MgCl₂ + H₂
2 mole of HCl 
 (2 × 36.458) = 72.8 g        
                    
1 moles of MgCl₂
(1 × 95.21 g) = 95.21 g
1 g  Mg will produce = 
4.67 mol Mg will produce 

Thus, the mass of MgCl₂ produced is 5.685 grams.
Learn more about mass
brainly.com/question/19694949
#SPJ4