B. carbon because it's atomic number is 6
        
                    
             
        
        
        
It's not really possible to tell longitudinal vs. transverse in this image as given. However, we can say that the waves labeled A are high-frequency (short wavelengths) while the waves labeled B are low-frequency (long wavelengths). So, this third answer choice would be correct here.
 
        
             
        
        
        
<span>2Li⁺(aq) + Zn⁰(s) → 2Li⁰(s) + Zn²⁺(aq) 
</span>2Li⁺(aq) + 2e⁻ → 2Li⁰(s) 
Zn⁰(s) → Zn²⁺(aq)  +2e⁻
2 electrons are transferred from atom of  Zn⁰ to 2 ions of Li⁺.
        
             
        
        
        
Answer:0.5 m/s 
Explanation: Divide D: distance To L: line 3.5 divided by 1.75 gives you 0.5 m/s 
distance/time 
 
        
                    
             
        
        
        
Answer:
2KBr + MgF₂ –> 2KF + MgBr₂
The coefficients are: 2, 1, 2, 1
Explanation:
KBr + MgF₂ –> KF + MgBr₂
The above equation can be balance as illustrated below:
KBr + MgF₂ –> KF + MgBr₂
There are 2 atoms of F on the left side and 1 atom on the right. It can be balance by writing 2 before KF as shown below:
KBr + MgF₂ –> 2KF + MgBr₂
There 2 atoms of K on the right side and 1 atom on the left side. It can be balance by writing 2 before KBr as shown below:
2KBr + MgF₂ –> 2KF + MgBr₂
Now, the equation is balanced. 
The coefficients are: 2, 1, 2, 1