Answer:
nitrogen
Explanation:
as the group number increases, the atomic radius decreases
 
        
             
        
        
        
Polar Covalent.
This is because both Calcium (Ca) and Carbon (C) are non metals, thus eliminating the ionic option.
It is polar covalent rather than nonpolar covalent due to the fact that the electrons in a polar covalent bond are shared unequally while those in a nonpolar bond are shared equally.
This can be determined by looking at the amount of valence electrons; if the electrons cancel each other out, it is shared equally. If not, it is shared unequally.
Hope this helps!
 
        
             
        
        
        
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:
a)M=0.20/(0.335*0.1025)= 0.20/ 0.034 = 5.88 g/mol
b) if 0.100g is used instead of 0.200g 
M = 0.1 / 0.034 = 2.94  hence the molar mass will be too low 
Explanation:
0.2000 gHZ gives  100ml acid solution
33.5 ml of 0.1025 M NaOH  is required to prepare it 
the moles = mass / molar mass
mass = 0.200 gHZ
moles = 0.0335*100 * 0.1025 = 0.034 
therefore molar mass = mass / moles 
                                   M=0.20/(0.335*0.1025)= 0.20/ 0.034 = 5.88
if 0.100g is used instead of 0.200g 
M = 0.1 / 0.034 = 2.94  hence the molar mass will be too low 
 
        
             
        
        
        
Answer:
ionic compound
Explanation:
that is the answer if you meant what type of compound.