Answer:
b. 760 g
Explanation:
The mass of the solution = 800 g
5% of NaCl by mass of the solution can be determined as follows;
     5% of 800  =   × 800
 × 800
                        = 5 × 8
                        = 40 g
The mass of NaCl in the solution is 40 g.
The mass of water = mass of solution - mass of NaCl
                                = 800 - 40
                               = 760 g
Therefore, the mass of water required is 760 g.
 
        
             
        
        
        
Answer: 
The Partial pressure of Xe and Ne will be 4.95 atm and 1.55 atm. The number of moles of Xe and Ne will be 3.13 and 0.981 
Explanation:
Let the total pressure of the vessel= 6.5 atm and mole fraction of Xenon= 0.761
As we know,

According to Dalton's Law of partial pressure-

Where,
 The pressure of the gas component in the mixture
The pressure of the gas component in the mixture
 Mole fraction of that gas component
 Mole fraction of that gas component
 The total pressure of the mixture
 The total pressure of the mixture

<u>Calculation: </u>
To calculate the number of moles,
PV=nRT


Learn more about Dalton's Law of partial pressure here;
brainly.com/question/14119417
#SPJ4
 
        
             
        
        
        
Answer:
0.382g
Explanation:
Step 1: Write the reduction half-reaction
Al³⁺(aq) + 3 e⁻ ⇒ Al(s)
Step 2: Calculate the mass of Al produced when a current of 100. A passes through the cell for 41.0 s
We will use the following relationships.
- 1 mole of electrons has a charge of 96486 C (Faraday's constant)
- 1 mole of Al is produced when 3 moles of electrons pass through the cell.
- The molar mass of Al is 26.98 g/mol.
The mass of Al produced is:

 
        
             
        
        
        
a compound in chemistry, is any substance that is formed when two or more chemical elements are chemically bonded together. A prime example of this is H20. You are combining hydrogen to oxygen, giving you a compund element. I hope this helps you. :)