You can see a physical change always but not always a chemical
        
                    
             
        
        
        
17, to be neutral it has to have equal number of protons and electrons
        
                    
             
        
        
        
Answer:

Explanation:
We will need a balanced equation with masses, moles, and molar masses, so let’s gather all the information in one place.
Mᵣ:                                 44.01
             C₃H₈ + 5O₂ ⟶ 3CO₂ + 4H₂O
n/mol:    1.5
1. Calculate the moles of CO₂
The molar ratio is 3 mol  CO₂:1 mol C₃H₈

2. Calculate the mass of CO₂.

 
        
             
        
        
        
Yes, o-toluic acid is soluble in ether as ether is slightly polar and it is soluble in NaOH because it is likely to form soluble compounds with it.
Naphthalene is insoluble in NaOH.
        
             
        
        
        
<span>Fill in the blanks: when an atom absorbs energy, the electrons move from their (ground) state to an (excited) state. when an atom emits energy, the electrons move from a(n) (excited) state to their (ground) state and give off (energy)</span>