i speak english . gracias!
        
             
        
        
        
0.781 moles 
Explanation:
We begin by balancing the chemical equation;
O₂ (g) + 2H₂ (g) → 2H₂O (g)
21.8 Liters = 21.8 Kgs
To find how many moles are in 28.1 Kg H₂O;
Molar mass of H₂O = 18 g/mol
28.1/18
= 1.56 moles
The mole ratio between water vapor and oxygen is;
1 : 2
x : 1.56
2x = 1.56
x = 1.56 / 2
x =  0.781 
0.781 moles 
 
        
             
        
        
        
Answer:
1. Tropical Climate
Explanation:
Due to the high heat in tropical climates, the moisture speeds up chemical weathering 
 
        
                    
             
        
        
        
Answer:
The answer to your question is: letter c
Explanation:
Data
V1 = 612 ml    n1 = 9.11 mol
V2 = 123 ml    n2 = ?
Formula
                                 
 
                                          
                                          
                                                 n2 = 1.83 mol