A continuous spectrum contains all the wavelengths 
A discontinuous spectrum has strips of specific colors and can be used to identify the elements making it.
hope this helps
        
             
        
        
        
Answer:
3MgCl2 has 9 atoms. 
Explanation:
The Element Magnesium (Mg) has 3 atoms.
The Element Chloride (Cl) has 6 attoms.
Their fore 6 + 3 is 9 of course. 3MgCl2 has 9 atoms. 
BTW: 3MgCl2 is a molecular compound as well as H2O and CO2. 
 
        
             
        
        
        
Answer:
The difference is 7.6 grams.
Explanation:
In mathematics the difference of two numbers is express as the subtraction between them:
          

So to find out the difference between the two measured masses, a will be represented by 123.6 grams since is the bigger number, and b by 115.972 grams.
Therefore, it is get:

<u>Hence, the difference is 7.6 grams. </u>
The result of 7.628 will be expressed as 7.6 to have the correct number of significant figures.          
  
Notice how that can be express in units of kilograms too since there is 1000 gram in 1 kilogram:
 ⇒
 ⇒ 
 
        
             
        
        
        
Answer:
A)6.15 cm to the left of the lens
Explanation:
We can solve the problem by using the lens equation:

where
q is the distance of the image from the lens
f is the focal length
p is the distance of the object from the lens
In this problem, we have
 (the focal length is negative for a diverging lens)
 (the focal length is negative for a diverging lens)
 is the distance of the object from the lens
 is the distance of the object from the lens
Solvign the equation for q, we find


And the sign (negative) means the image is on the left of the lens, because it is a virtual image, so the correct answer is
A)6.15 cm to the left of the lens
 
        
             
        
        
        
<span>The Dynamo Theory
Let Me Know If You Need Anymore Help
~Witt</span>