Answer:
Explanation:
i don't know if this is 100% correct but i think it's inertia
 
        
             
        
        
        
Answer:
 protons = atomic numbermass number = protons + neutronsatomic number = mass number - neutrons = 78-38 = 40
Explanation:
 
        
                    
             
        
        
        
(4) slate because it is the strongest
 
        
                    
             
        
        
        
The by-product of the chlorination of an alkane is  <u>HCl</u>
Explanation:
- Chlorination is the process of adding chlorine to drinking water to disinfect it and kill germs. Different processes can be used to achieve safe levels of chlorine in drinking water.
 - Chlorination of alkane gives a mixture of different products. 
 - When consider mechanism of alkanes chlorination, free radicals are formed during the reaction to keep the continuous reaction. 
 - Different alkyl chloride compounds, extended carbon chains compounds and HCl are formed as products in product mixture.
 - Chlorination byproducts, their toxicodynamics and removal from drinking water.
 - Halogenated trihalomethanes (THMs) and haloacetic acids (HAAs) are two major classes of disinfection byproducts (DBPs) commonly found in waters disinfected with chlorine
 -  Chlorine is available as compressed elemental gas, sodium hypochlorite solution (NaOCl) or solid calcium hypochlorite (Ca(OCl)2
 
 
        
             
        
        
        
Answer:
2Fe(s) + 3O2(g) --------> 2FeO3(s)
 Explanation:
According to the question, a  battery was used  to light the steel wool by bringing the terminals very close together. When  the battery came into contact with the steel wool, current was sent out through the thin wire.  This caused the iron to heat up quite well. 
Iron reacts with oxygen under these conditions as follows; 
2Fe(s) + 3O2(g) --------> 2FeO3(s)
This is the chemical reaction that occurs when the steel wool is set on fire.