To solve for the number of moles, we simply have to use the Avogadros number which states that there are 6.022 x 10^23 molecules per mole. Therefore:
 
number of moles = 6.67 X 10^40 chlorine molecules / (6.022 x 10^23 molecules / mole)
number of moles = 1.108 x 10^17 moles
        
                    
             
        
        
        
The ball travels 10m/s 
Speed = distance/time
        
                    
             
        
        
        
Answer:
CHO
Explanation:
Carbon = 41%,  Hydrogen = 4.58%, oxygen = 54.6%
Step 1:
Divide through by their respective relative atomic masses
41/ 12,         4.58/1,         54.6/16
3.41              4.58            3.41
Step 2:
Divide by the lowest ratio:
3.41/3.41,      4.58/3.41,     3.41/3.41
1,                    1,                  1
Hence the empirical formula is CHO
 
        
             
        
        
        
Answer:
A. Intramolecular interactions are generally stronger.
B. a. Only intermolecular interactions are broken when a liquid is converted to a gas.
Explanation:
<em>A. Which is generally stronger, intermolecular interactions or intramolecular interactions?</em>
Intramolecular interactions, in which electrons are gained, lost or shared, constitute true bonds and are one or two orders of magnitude stronger than intermolecular interactions.
<em>B. Which of these kinds of interactions are broken when a liquid is converted to a gas?</em>
When a liquid vaporizes, the intermolecular attractions are broken, that is, molecules get more separated. However, true bonds are not broken which is why the molecules keep their chemical identity.
 
        
             
        
        
        
The number  of Ml  of  a  0.40 %w/v solution  of   ,nalorphine  that must  be injected  to  obtain  a  dose  of 1.5 mg is  calculated as  below
since M/v%   is  mass  of solute  in  grams per 100  ml
convert Mg to  g 
1 g = 1000 mg  what  about  1.5 mg =?  grams
=   1.5 /1000 = 0.0015 grams
volume is therefore =  100 (  mass/ M/v%)
= 100  x(  0.0015/ 0.4) =  0.375  ML