Answer:
barter trade
Explanation:
because you exchange goods
 
        
             
        
        
        
Answer.
The answers is A; The physical and chemical properties of HCl are different from those of H2 and Cl2.
Explanation; 
Hydrogen chloride is a gas, which is a molecule made up of a hydrogen and a chlorine atom bonded by a single bond. 
The chemical and physical properties of HCl differs from those of hydrogen and chlorine. For example; they have different molecular weight; HCl is colorless, while chlorine is greenish yellow and hydrogen is colorless
        
                    
             
        
        
        
The CPT code that will be reported for moderate sedation is 9914 [4].
This is the government approved CPT code for moderate sedation for patients that are five years old and older and the code is used when the moderate sedation and the other needed procedure is performed by the same health provider for the intraservice period of 15 to 30 minutes.
        
             
        
        
        
Drilling with pipe and mud
        
             
        
        
        
Answer:
iron
Explanation:
iron helps in blood making