Answer:
a mixture of two these
Explanation:
The number of isomeric monochlorides depends on the structure and number of equivalent hydrogen atoms in each isomer of pentane.
 n-pentane has three different kinds of equivalent hydrogen atoms leading to three isomeric monochlorides formed.
Isopentane has four different types of equivalent hydrogen atoms hence four isomeric monochlorides are formed. 
Lastly, neopentane has only one type of equivalent hydrogen atoms that yields one mono chlorination product.
Hence the cylinder must contain a mixture of isopentane and neopentane which yields four and one isomeric monochlorides giving a total of five identifiable monochloride products as stated in the question.  
 
        
             
        
        
        
Answer: The mass in  atoms of zinc is 0.405 g.
 atoms of zinc is 0.405 g.
Explanation:
 Given: Atoms of zinc = 
It is known that 1 mole of every substance contains  atoms. So, the number of moles in given number of atoms is as follows.
 atoms. So, the number of moles in given number of atoms is as follows.

As moles is the mass of a substance divided by its molar mass. So, mass of zinc (molar mass = 65.39 g/mol) is calculated as follows.

Thus, we can conclude that the mass in  atoms of zinc is 0.405 g.
 atoms of zinc is 0.405 g.
 
        
             
        
        
        
The volume  in  liters  of  576 grams  of SO2  gas  at STP  is   calculated as below
calculate the moles of SO2 = mass/molar  mass
= 576 g/64 g /mol  = 9 moles
At  STP  1mole =22.4 L
what  9 mole =? liters
by cross  multiplication
= 22.4 L x  9 moles/ 1moles = 201.6 liters
        
             
        
        
        
Answer to the Question
C. Barium phosphate
        
             
        
        
        
Answer:
pH=8.676
Explanation:
Given:
0.75 M 
0.20 M 
The objective is to calculate the pH of the buffer using the kb for 
Formula used:
![pOH=pka+log\frac{[salt]}{[base]}\\](https://tex.z-dn.net/?f=pOH%3Dpka%2Blog%5Cfrac%7B%5Bsalt%5D%7D%7B%5Bbase%5D%7D%5C%5C)
pH=14-pOH
Solution:
On substituting salt=0.75 and base=0.20 in the formula

pH=14-pOH
On substituting the pOH value in the above expression,
pH=14-5.324
Therefore,
pH=8.676