It would be C 
2 kg x 1000 g/kg x 1mol/18.02 x 6.03 kj/mol = 669kj 
        
                    
             
        
        
        
Answer: 10L
Explanation:
Given that:
Initial pressure P1 = 1 atm
New pressure P2 = 3 atm
Initial volume V2 = 30 L
New volume V2 = ?
Since pressure and volume are involved, apply the formula for Boyle's law
P1V1 = P2V2
1 atm x 30L = 3 atm x V2
30 atm L = 3 atm x V2
V2 = (30 atm L / 3 atm)
V2 = 10L
Thus, volume changed to 10 liters 
 
        
             
        
        
        
Answer:
Plants use photosynthesis to make glucose. Glucose is also know as sugar. You can tell it is present if the plant receives sunlight as well as water.
Explanation:
MARK BRAINLIEST
 
        
             
        
        
        
Answer:-
As we can see from the graphical data,
The distance covered by all the four runners is the same 5 km.
Among the four athletes, Athlete P covers the distance in under three hours.
It is the minimum time taken among the four athletes.
Thus Athlete P covers the 5 km distance in the minimum amount of time.
We know that speed = 
Since time taken for P is minimum, his speed is the maximum. P ran the fastest.
Time taken by Q = 4.5 hours.
 Speed of Q = 
                      = 
                     = 1.1 km/ hr
Time taken by R = 6 hours.
 Speed of R = 
                      = 
                     = 0.8 km/ hr