1 mole contains = 6.02x10^23 atoms. 0.31mole contains = 0.31x6.02x10^23 = 1.8662x10^23.
        
             
        
        
        
The scientist observes at what rate is the concentration increasing or decreasing.
 
        
                    
             
        
        
        
i. When an acid reacts with metal, a salt and hydrogen are produced:
ii. When oxygen and metal react,  metal oxide forms also known as rust
iii. metal and water produce hydrogen gas
 
        
             
        
        
        
1.Organism
2.Organ system
3.Organs 
4.Tissues 
5.Cell 
        
                    
             
        
        
        
Answer:
T₂ = 51826.1 K
Explanation:
Given data:
Initial Volume = 2.3 L
Final volume = 400 L
Initial temperature = 25 °C (25+ 273 = 298 K)
Final temperature = ?
Solution:
V₁/T₁ = V₂/T₂
T₂ = V₂ T₁/V₁
T₂ =  400 L . 298 K / 2.3 L
T₂ = 119200 K. L / 2.3 L
T₂ = 51826.1 K