In order to find molarity, you must first find the number of moles that was dissolved.
Now, Moles = Mass ÷ Molar Mass
                    
⇒  Moles of NaCl  = 2.922 g ÷ 58.44 g/mol 
                       
                               = 0.05 moles
∴ the Molarity of the NaCl is 0.05 M [Option 1]
        
             
        
        
        
Answer:
8.33 atm
Explanation:
Xe is   5  out of (4+5)   or   5 / 9 ths of the gas present 
   5/9  * 15 atm = 8.33 atm
 
        
             
        
        
        
The total kinetic energy of the gas sample is 3.3 KJ
<h3>What is kinetic energy? </h3>
This is the energy possessed by an object in motion. Mathematically, it can be expressed as:
KE = ½mv²
Where 
- KE is the kinetic energy 
 - m is the mass 
 - v is the velocity 
 
<h3>How to determine the mass of the fluorine gas</h3>
- Molar mass of fluorine gas = 38 g/mol
 - Mole of fluorine gas = 1 mole
 - Mass of fluorine gas = ?
 
Mass = mole × molar mass
Mass of fluorine gas = 1 × 38
Mass of fluorine gas = 38 g
<h3>How to determine the KE of the gas sample</h3>
- Mass (m) = 38 g = 38 / 1000 = 0.038 Kg
 - Velocity (v) = 415 m/s
 - Kinetic energy (KE) =? 
 
KE = ½mv²
KE = ½ × 0.038 × 415²
KE = 3272.275 J
Divide by 1000 to express in kilojoule 
KE = 3272.275 / 1000
KE = 3.3 KJ
Learn more about energy:
brainly.com/question/10703928
#SPJ1
 
        
             
        
        
        
Gasoline would be a mixture if I recalled 
        
                    
             
        
        
        
Salt dissolving in a glass of water, using electricity to break down water into hydrogen and oxygen, rust forming on an iron fence and gas burning on a stove.