Answer:
I think it both physical & chemical change :')
 
        
             
        
        
        
Answer:
The slope of the line is  .
.
Explanation:
The slope of the line ( ) is the change in dependent variable (
) is the change in dependent variable ( ) divided by the change in independent variable (
) divided by the change in independent variable ( ):
):
 (1)
 (1)
If we know that  and
 and  , then the slope of the line is:
, then the slope of the line is:


The slope of the line is  .
.
 
        
             
        
        
        
Answer:
A. NaHCO₃
Explanation:
NaHCO₃ ⇒ NaOH + H₂CO₃
NaOH is a strong base and H₂CO₃ is a weak acid. Therefore, NaHCO₃ is a salt of a strong base-weak acid reaction. The salt is basic because carbonic acid (H₂CO₃) is a weak acid so it remains undissociated. So, there is a presence of additional OH⁻ ions that makes the solution basic.
Hope that helps.
 
        
             
        
        
        
I think the answer is 4 carbon dioxide
        
                    
             
        
        
        
Answer:
D. 7
Explanation:
The halogens are found in Group 7 of the Periodic Table. If Bromine is a halogen, then that means it would be found in Group 7. Also, elements in Group 7 have 7 electrons in its outer shell, Bromine would have 7 electrons in its outer shell.