Answer:
Boiling point of the solution is 100.78°C
Explanation:
This is about colligative properties.
First of all, we need to calculate molality from the freezing point depression.
ΔT = Kf . m . i
As the solute is nonelectrolyte, i = 1
0°C - (-2.79°C) = 1.86 °C/m . m . 1
2.79°C / 1.86 m/°C = 1.5 m
Now, we go to the boiling point elevation
ΔT = Kb . m . i
Final T° - 100°C  =  0.52 °C/m . 1.5m . 1 
Final T° =  0.52 °C/m . 1.5m . 1  + 100°C → 100.78°C
 
        
             
        
        
        
Answer:
Noble gases have a complete valence electron shell making them stable and nonreactive.
Explanation:
 
        
             
        
        
        
a) 56g
<h3>Calculation:</h3>
At STP, 
22.4 L of N₂ = 1 mol 
We have given 44.8 L of N₂, therefore,
44.8 L of N₂ = 
                     =  mol
 mol
We know that,
1 mol of N₂ = 28 g
Hence,
2 mol of N₂ = 28 × 2
                    = 56g
Hence, there are 56 g of N₂ in 44.8 L of nitrogen gas.
Learn more about calculation at STP here:
brainly.com/question/9509278
#SPJ4
 
        
                    
             
        
        
        
I don't know if this is multiple choice but if it isn't I can name of few.
Fun Fact: Noble Metals are chemical elements that have outstanding tolerance and resistance to oxidation.
Answer: Palladium, Silver, Platinum, and Gold. Those are all examples of Noble Metals. 
Other: Ruthenium, osmium, and rhodium.
<em>Hope this helps!</em>