Answer: A-2 energy levels 
Explanation:
Sorry if i’m wrong
 
        
                    
             
        
        
        
Answer:
when the red litmus paper is placed in a jar of ammonia, the red litmus paper turns into blue as ammonia gas is basic in nature. It confirms the alkalinity of the ammonia gas. 
 
        
             
        
        
        
Isotopes of  the same element
₃₅⁷⁷X and ₃₅⁸¹X
<h3>Further explanation</h3>
Given
Isotopes of element
Required
Isotopes of  the same element
Solution
The elements in nature have several types of isotopes  
Isotopes are elements that have the same Atomic Number (Proton)  and different mass numbers
Element symbols that meet the 2 conditions above are :
₃₅⁷⁷X and ₃₅⁸¹X
 
        
             
        
        
        
so one liter is about 2. something gallons so at 12.8 km/l you would get about 30 mpg which is insane but yeah
 
        
                    
             
        
        
        
Hey there! 
Sulfuric acid: H₂SO₄ 
H: 2 x 1.008 = 2.016 
S: 1 x 32.065 = 32.065 
O: 4 x 16 = 64
--------------------------------
                  98.081 g/mol
The molar mass of sulfuric acid is 98.081 g/mol. 
Hope this helps!