Answer: 5 
Explanation: you divide the distance by the time and get the speed.
        
             
        
        
        
Explanation:
The given data is as follows.
  Weight of solute = 75.8 g,   Molecular weight of solute (toulene) = 92.13 g/mol,    volume = 200 ml
- Therefore, molarity of toulene is calculated as follows.
       Molarity = 
                     = 
                     = 4.11 M
Hence, molarity of toulene is 4.11 M.
- As molality is the number of moles of solute present in kg of solvent.
So, we will calculate the molality of toulene as follows.
    Molality = 
              = 
              = 8.6 m
Hence, molality of given toulene solution is 8.6 m.
- Now, calculate the number of moles of toulene as follows.
        No. of moles = 
                              = 
                              = 0.8227 mol
Now, no. of moles of benzene will be as follows.
      No. of moles = 
                              = 
                              = 1.2239 mol
Hence, the mole fraction of toulene is as follows.
          Mole fraction = 
                              = 
                              = 0.402 
Hence, mole fraction of toulene is 0.402. 
- As density of given solution is 0.857  so, we will calculate the mass of solution as follows. so, we will calculate the mass of solution as follows.
          Density = 
      0.857  =
 =  (As 1
      (As 1  = 1 g)
 = 1 g)
                       mass = 171.4 g
Therefore, calculate the mass percent of toulene as follows.
       Mass % = 
                    = 
                    = 44.22%
Therefore, mass percent of toulene is 44.22%.
 
        
             
        
        
        
Answer:
Explanation:
Examples of applied chemistry include creation of the variety of laundry detergents on the market and development of oil refineries.
 
        
             
        
        
        
The compound that will have a sweet smell would be the one, whereby the molecular formula closely resembles that of an ether
R-O-R. 
I believe the third one 
        
             
        
        
        
Answer: Water becomes gas at D-E.
Explanation:
In the flat line D-E water is absorbing energy to become gas, and when the water is completely gas, the temperature will increase again therefore the line will rise up.