To solve this problem, all we need is the conversion
factor.
We know that there are:
1 liter = 202.884 teaspoons
 
Therefore the mass of Phenobarbital is:
mass = (2 grams / 1 Liter) * (1 teaspoon) * (1 Liter /
202.884 teaspoons)
<span>mass = 0.00986 g = 9.86 x 10^-3 g = 9.86 mg</span>
 
        
                    
             
        
        
        
Answer:
9 + (-8) = 1 
Step-by-step explanation:
 
        
             
        
        
        
Answer:10-3
2-4
Step-by-step explanation: